This is so relatable to me, working in retail and holding my tongue with rude customers while thinking "I could be doing so much on my art instead of dealing with this person treating me like crap" - recent situation in UK means I'm still in lockdown, hence my recent progress artwise. But the shop's reopening next month and I'm definitely weighing my options. Your plan is the bold move I daydream of doing and I wish all the luck to you (I'm confident you'll fine, just got to keep a focused attitude)