You're welcome.
Spend a few weeks learning to bench press with a barbell properly. When compared to doing it on a smith they're worlds apart in technique and what you can actually lift. So hammer down some good form and get some good time under the barbell. After a couple weeks you can test outa 1RM. You should use a spotter for that if possible. If not just stop short of failure and use that number. Use your max to calculate the weights to be used based on the percentages above. You can change the percent age and reps and sets daily or weekly or undulate between all. The goal though is to keep adding weight to the bar over time. So if you did 6sets of 3reps at 85% which turned out to be 250lbs. The following week or two weeks you should try 6x3 @ 255lbs. Same with the other rep ranges.
For the accessory and isolation lifts you don't need to use percentages and RPE would be a better way to use them. An RPE of anywhere from 7-9 is fine but keep the reps on these lifts higher than you wild for bench. You're not using then to build strength so much as to add volume and fatigue to your chest.
As a powerlifter, I don't work chest or body parts for that matter. I work lifts ie squat, bench and deads. I do 6 bench press sessions or a variant like CG bench, touch and go bench, 2ct paused bench, 3ct paused bench, floor press, etc a week and I workout 4days a week now. This means I do a "bench session everyday I'm in the gym and 2 of those days I do two bench sessions in the day. So I can do that bc I'm not doing a toN Of other work on my chest. If you plan on adding a lot of smaller work on top of benching for your chest I would start off a twice a week and go from there. Once you get accustomed to it you can go 3x a week if you feel recovery is good. If not stick to twice a week.