People who recommend an AI over a SERM are too stupid or lazy to get a SERM. It's NOT hard. You will find some people who sell OTC products trying to hype SERMs being toxic and such... but they are given to women looking to get pregnant. That should tell you how safe they are.
For bloodwork, you would go to an independent lab where you'd pay $100-$200 and they would draw your blood and send you the results. The reason for this is it won't go on your medical records.
You get to choose which tests they do, you want to get:
Liver function
Lipid Panel
Testosterone+Estradiol
And maybe Kidney function, but often creatinine and BUN will be off in bodybuilders due to diet anyway.