I've considered myself as someone who enjoys making others laugh ever since elementary school and I watch stand up comedies every day.
I've been contemplating at some point in my life trying to do stand up. Anything worth doing is worth doing right so thus far I have what I feel is a great opening joke and I have some other short jokes and short stories that are funny but that's probably only about 5-10 minutes worth of material.
I like how comedians have the "bring back" punchline where early on in a joke they'll have a punchline lets say some joke than ends with purple pussy. Later on somehow incorporate that same punchline as the "bring back" joke as those are always good. I don't have that yet.
Any advice or tips?
My opening joke is original so I don't want to share it here and have it stolen but it's a rape joke. I tried it out on one friend last night and he legit laughed and said...."That's good....that's reeeaaal good".
I did stand up for a couple of years. It's fun and terrifying, but if you want to be any good at it, you'll have to hit the trenches in the hell rooms and pizzerias where most of the room is full of jaded comics and people who didn't come to watch comedy. You'll have to perform a ton for no money for a while at first as well, as you start to establish a name in whatever scene you start in.
You won't need more than 5 or 6 minutes of material at first. That's usually all you will get at open mics, especially when you first start. As much as you think you have your shit together and ready, go up with notes the first few times you go up.
In terms of the "bring back" punchline, it's actually called a callback, and while they do work well if they are crafted carefully, it's not like you have to have something like that to have a good set. The beauty in comedy is that it's nearly limitless. Use a specific joke format because it makes a joke better; don't start with wanting to write a callback just to write a callback.
I would strongly advise you to not open with a rape joke. It is very easy to lose an audience that isn't comfortable yet, and damn near impossible to gain them back if you aren't any good at comedy (prepare to suck btw, almost nobody is good or comfortable at first.)
Another thing to consider is that you literally never know if what you wrote is funny until you try it in front of an audience. I wrote some throwaway jokes that I thought would just be a quick joke that got a chuckle and they killed, and I also wrote some jokes that I thought were going to be huge, signature bits that got literally nothing when I told them onstage. One of the worst things a comic can do is start with something that's too offensive and doesn't land. It helps to earn the crowd's trust first. The hardest thing about comedy is that it's the only medium that I can think of that you can't practice alone. When you are learning how to play the guitar, you are sitting in your room by yourself when you make your mistakes. When you are learning how to do stand up and working on your material, you fail with a microphone on your hand and a spotlight facing you in front of a group of strangers. It's exhilarating, humiliating, and one of the most rewarding things I have ever tried to do.
Finally, be nice to promoters and take care of them when you can, but know that they are even scummier than the comics are. Also, at first you will want to memorize every word that you are going to say onstage, and that's good for when you are starting, but eventually you will have to leave that bubble and be more free. If you memorize everything you are going to say and time it to exactly the amount of time you are allotted up there, but something happens that you want to comment on, or someone heckles or something, it can throw you completely off because you were so married to what you practiced. Some comics (Carlin, Jeselnik, etc.) can get away with scripting every word but it's rare because it is hard to make it not sound like a speech. Be ready for variables and realize that you are likely entertaining drunks who want to be a part of the show, so don't be surprised when someone starts yelling things at you. Also, try not to go straight for "shut the fuck up you cunt whore" when someone heckles you, as that can backfire big time. I told a biker gang full of 40-60 year old men to go fuck themselves from the stage when I was 22 or so, and I completely lost them and got threatened by the youngest one before I left. I also had a lady come onstage and try to physically remove the mic from my hands once, but I was a better comic by then and was able to play with it.
If you have any specific questions, I'd be happy to help you, just don't ask "do you think this is funny" and write your bit out on here, because that's not how it works. When I started, I did that a few times with other comics that I know, but the good ones will always tell you to just try it on stage.