With the questions all over the place, and things you're worried about, you're best off looking into an alternative medicine clinic for advice and prescriptions.
If you're at risk of heart issues already, anything higher than TRT dosing can potentially put you at risk with cardiac issues via different channels from blood itself to cholesterol, etc.
Specific peptides and SARMs can also cause cardiac issues so wise to be very diligent researching even with those prior to use.
How well you handle stress now, and your temperament, is an indicator for how you can/will be regardless of a compound. There is no such thing as "roid rage". That's a cop out for shitty behavior and self control. Sure high androgen levels can compound that, shorten your tolerance for BS, yadda yadda. But that's things to be aware of beforehand. Healthy testosterone levels (normal range or slightly above) are actually proven to help stress, mood, etc.
You need to get a baseline test done on everything. CBC/CMP/estradiol ultra sensitive, test free/total, thyroid, lipid panel, PSA, etc.
Beginner cycle info is dime a dozen on the web Test, maybe a oral kicker. Your total test being 400s, even a TRT dosing cycle of 200-250/wk for 12-16 weeks will show good results and have your total test in the 12-1500 range, free should be 450-700.
TRT protocols are permanent. That's why it's called replacement, it's a decision to make with yourself. Granted they will still attempt to keep your natural hormones production functioning, via HPTA, if you desire to try to procreate.
Cycling isn't permanent, and there are methods to keeping everything functioning correctly. Granted it "can" cause permanent damage if you are using superficial amounts of hard compounds, long term, no preventative measures, etc. Basically being an idiot with no plan.
Having kids is a whole different conversation, doable for guys on TRT, doable for guys who have cycled for years. Call it the 6 P's. Proper planning prevents piss poor performance.
I know I repeated/covered some stuff other guys did but it's for good reason. Lot of misconception and bad information out there.