Rick’s portrait

Hi Matt- 

I did a small portrait this week (about 4 inches tall) from an Earthsworld reference.
Odd question this week. I’ve had a handful of people ask me to draw portraits for them as a commission. But, I feel like my likenesses are still too far away most of the time to charge somebody. or my pieces don’t feel “finished” or professional enough. Any advice on knowing when to start taking commissions or advice on what I need to do to get my skills to the next level?

Thanks!