What's his situation? Does he have children? Does he work shifts or weekends?
Firstly you need to look at what works for you. I made a rule for myself when starting OLD that existing activities and friends came first, because they'll probably outlast any relationship, and exercise is important.
I assume three teens means at least one of them is younger, so you probably have logistical issues about childcare/lifts to activities and so on. That may mean it really reduces your options for doing overnights together, especially if he also has children. And how established should you be before introducing new partners to children?
Your and his work could restrict things further - what free time do you actually have together? Do you have to work in a specific workplace, or can you WFH, be it your or his? An hour's travel on top of a long work day could mean you can only do weekends only.
And then there are expectations around sex. Men at this age are not as ever-ready as they were in their 20s, and some need Viagra (not all, though.) If they or you are not that fit or flexible, it will restrict the positions you can manage. You might be going through an early peri stage of wanting sex all the time, or you might be not that bothered at all. You should consider STIs, even if you're post-menopausal, and if you're not, you need to consider contraception against pregnancy as well. IME of an active year of OLD, despite the fact we all grew up with the AIDS epidemic, men will not mention any of this at all unless you do, and will assume they can fuck with nothing in place unless you bring it up. It did not surprise me in the news to hear stats for gonorrhoea and syphilis have gone up.
And then don't assume you're exclusive unless you've had that conversation. It's not like when we were teens and if you were going out with one person, anyone else would be two-timing. In early dating these days, it needs to be overtly discussed, not assumed.
But you need to work out your boundaries for yourself.