If you are going to work back up to it I would say start slow and getting your back and shoulders strong contributes to your bench but you wouldn't want to suddenly be challenged to do it and then just jump in there and try to do it because you can tear your shoulder or your peck.
Even if I hadn't benched in 2 months I wouldn't even try doing 225lb. I would maybe go up to 135lb but if I hadn't done it in years I would even start out with even lighter and build up.
This is one of the reasons it is frightening to try to do 1 rep maxes. You an get in this max tension and just tear a tendon right off your bone. It's terrible.
I have one of those total gyms at home, I've been using it a little bit about three times a week for a couple of years now. It's made a huge difference in my upper body, but I don't really know how much which is why I'd like to try some free weights again sometime.
Another point I wanted to make with it is you might be strong enough to rep 225lb+ out 5 or more times or more than 10 or whatever. The thing is getting your connection points acclimated to that range and testing them safely instead of tearing something.
"practice safe sets"
I worry about catastrophic injuries all the time and the risk vs reward of all this. Hahhahah.
There's a good chance I will never do it. I don't have anyone to spot me and there is no way I would try anything alone. I'll just stick to using the total gym and doing the occasional push up.
That would get you well on your way and so can pushups. I'm not crazy on pushups. I would maybe be able to do 50 in a row and not have my form break down completely but if I'm just doing pushups to sort of do something if I'm not able to get in the gym I will do 2 sets of 30 and I feel like if I could do that and wasn't in a gym for a long time I would be able to warm up and get up to 225lb without getting hurt.
You might already be close to getting it and repping it but I would say if you try it in a gym the safest way would be to go in there once and just go up to 135lb and see if you can get up to 5 reps the first time in and don't try to bench for the next 4 days and see if you feel a ton of soreness in your pecks and let them sort of recover. Then the next time trying to go up to 185lb and see if you can get it for 2 reps or so and do the same thing. Take some time and see where you are at. Keep doing a similar thing and working your way back up and past 225lb.
The reason why I say all this is because the most dangerous situation is someone feeling really strong and really good and moving on up and then suddenly tearing their peck. I had a friend who is 6'7" and got all the way up to 295lb body weight and played football for SMU. He could rep 315lb and I think got up to around 435lb for a one rep bench max. He hadn't benched heavy for a couple years and he got back on the bench and felt strong and though it wasn't a big deal to load up 315lb and tore his peck. So even if you feel good your connection points might not be ready for it.
Trust me I worry about it all the time. If something gets overloaded it can tear.