We need a lot more context to your question. It's sounds like you havent done much research but id start by starting your own thread instead of posting on this old unrelated thread
GW cardarine is always a great addition for fat burning. SR9009 is also good for fat burning. Get your diet dialed in and add in some MK2866 or RAD140 for strength and lean mass and that will make a grrat first sarms cycle. Umbrella labs has everything you need
Running those while shutdown is a waste. You need to wait until after you are off the compounds and esters begin to clear for them to start working. Usually 2 weeks after last injection
There os defintely things you can do to decrease risk, but its certainly a risk of long term HPTA damage at your age. Thays why we recommend no earlier than around 25
There is little to no sides with sarms, so I would suggest 15mg. If you want to start lower thats fine but I wouldnt waste a lot of time at the lower dose as it wont yield the same results
They should have you dialed in to a test dose that doesn't require taking an AI. Thats what everyone means and you are at the high end of normal range right now so test dose might be a little high. What have your estrogen levels been at? I wouod suggest dropping the AI