I would definitely only use test for a 1st cycle. Test is a very good base for any cycle. Something like Test E. Run a Test E cycle for 10-12 weeks at 500mgs/week split into 250mg doses bi-weekly and see how your body responds. Using an oral to kickstart a cycle is a good idea and helps get results faster as Test E typically takes 4-5 weeks to begin to kick, but I would not recommend it for a 1st cycle. You dk how your body will react with the test or the oral. If you have complications early on, which do you drop? Test only first cycle, then you can throw in an oral with test for a second cycle or use test and deca without an oral.
The only source(s) you're most likely going to find are guys at the gym, but even then it can be a hit or miss. Many gear users won't tell you they're on anything for the simple reason that many undercover cops will pose as an interested individual looking to jump on some gear. Once the guy spills the beans, he's caught. My gf's older brother who is 33 was asked by one of his buddies who's a cop to go help unmask gear users in a gym. Pretty sorry thing to do if you ask me.
You just never know who you can and can't trust. Even your buddies that supposedly have "connections" can jack you up. Just because the "connection" hands you a bottle with a test label on it doesn't mean it's test. You have to be very careful these days.