I would say the following
- If is is hard to pronounce or spell, I would adapt it
- I would NOT go for a totally americanized name like Mike, that is craziness.
- My name is Yosef, but I go with Yossi to make it easier. With my name Yossi Mlynsky - SEO of my name is great!
- I love the name Misha = stick with it.
- You can create a company or LLC for clients to send checks to.