I have been paying $50 for a 1 hour lesson twice a month. I practice daily but I find I need the full 2 weeks between lessons. So I am comfortable with $100/month. That much can get me basic memberships on 3 of the site's I mentioned and perhaps gold membership in 1 of them which includes live feedback. Is that where you were going?
Well, that much (1200 per year) will buy you into pretty much any of the online websites.
The problem with them is that they frequently have so many options that you have a difficult time knowing what to do next.
So, you begin dabbling here and there.
It is fun .... but very inefficient.
Also, your background may be a little thin for attempting to jump into jazz piano.
That doesn't mean you couldn't do it ... it just means you would have difficulty understanding some things that you have not been exposed to yet.
My best advice (other than a live teacher) would be this website ....https://pianoteachersconnect.com/
There you can connect with a teacher online (via skype or zoom) and explain to them your background and where you wish to go.
They have many teachers (at very reasonable prices) who can evaluate your skills and get you started in the right direction.