mens Legends Shorts Sleeve Tee

I'm 6' 190 pounds, after reading all reviews of oversized fits what size is recommended? i always buy nike in xl but now thinking size large??

If you carry extra weight in your stomach will this shirt cling or is it more relaxed/looser?

The white one is it see trough or is the fabric thick and not see trough ?

Looking to wear this as a base layer under golf shirts. Will this be fitted enough to wear under another shirt?