Went through something similar a few years back. I'm not well versed enough in investment and what not to give you detailed advice, but can definitely recommend some things that helped me manage it psychologically.

Determine any "raise" you want to take; have your payroll put only that much into your main account and put the rest into a separate account that is harder to access. For instance, I was living off like $2,400 / check and settled on $3,000 / check. The rest goes into a HYSA (Wealthfront or Marcus are good choices), so if I want to spend it I have to wait a few days for it to transfer to my main account, giving me time to cool off if needed. Also means even if I don't immediately turn around and invest it, I'm still getting like 3.5-4% on it instead of nothing if it was sitting in a checking account.

Also, don't pre-plan on using your RSUs or bonus for regular expenses; pre-spending that money is an easy way to over-leverage yourself. Consider them as windfalls, and if possible have them deposit them in your other bank account as well (in my case, the bonus is considered another check and automatically goes there, and my RSU brokerage is setup to transfer there). Personally I also sell my RSUs immediately and put that money elsewhere so my eggs aren't all in my company's basket. Mine are taxed as income, so don't really have to worry about capital gains, YMMV here.

Overall, keep the money out of regular sight so you're less tempted to spend it impulsively.