You need to understand that there is no "right" age for steroids and bodybuilding drugs unless you are on HRT or severely injured. Tell me which guy in the top 100 said "oh no, I don't want growth hormone, I'm too young for that". You need to set some realistic attainable goals. You need to get in shape to do a show. See what you've got. Try it out. Keep your doses small and stick with basic drugs. They all do the same thing... if you want more add IGF. Quite frankly it's my opinion that anyone using bodybuilding drugs should be using IGF. Stop worrying about this peptide and that drug. Test, Deca, IGF, and lots of lean beef. With your current size you should be able to put on 80 lbs fairly quickly. Bodybuilding is all about the law of diminishing returns. You aren't catching on to that. I can keep 90% of my condition eating 3 times a day on 200mg a week of test and training once or twice a week. All the other stuff is just fun fluff or stuff advanced guys need to get that last 5 lbs of muscle. The difference is IGF will up regulate your receptors and help build new muscle cells. Literally until your 300 lbs you don't need to worry about the other stuff.
There are guys at the gym that are always talking about how many thousands of milligrams of 6 different steroids and peptides and all that crap and these guys are my height and MAYBE 180... being as I'm 5'9 and your are 6'3 that's about where you are. I am using more than I normally do (for maintenance ) now and trying to put more muscle on my already 250 lb physique and they are taking 5 times more than me!
You need to stop spending money on peptides and anything but the basics and hire a legit trainer. I know how the young kids think they don't need a trainer, but a good trainer will put more muscle on you in 10 weeks than 2 grams of whatever the cool new steroid is. Shit if I decide to do another show sometime I'm going to hire a trainer for the entire thing including a few months prior.
Whatever you are thinking about I've probably done it. Thats not bragging. I was a dumb kid and I didn't want to take good advice.
400mg of test
400mg of Deca
50-100mcg of IGF daily (MC is the only 100% legit source that I have had 100% success with over the last 10 years)
2- 3lbs of lean meat per day
Legit trainer. If you have anything close to what's needed to be Pro, that will get you there