Great analysis. Most beginners don’t understand rpe and 1rpm I think it’s a good place to start.

I determine my 1 rep max: the amount of weight you can pick up in number of different exercises but particularly focused on compound (multi joint) lifts which include deadlift, bench press, squat and standing overhead shoulder press. With pretty good form not failing on form on a 1rpm is important it might cause you to overestimate what you can realistically do! This can be detrimental in the long term to your goals so make sure you have at least semi decent form and at least a intermediate understanding of the movement itself

With this info I subtract 25% from each lift and work from there as my new working set so for example if you can deadlift 500lbs (226kg) 75% of that is 375.

I would work within this number for 3 weeks. Increasing my sets by 1 every week in intervals of 2,3,4. When I can do 4 sets of 5 reps at this weight I now know I’m able to move up.

The next part is tricky and requires small understanding of your rate of perceived exertion: this will tell you if you are ready to increase by 2.5% or by 5%. Whichever it is it takes another 3 weeks at this weight to master it.

I do this for all my major compound lifts. Upon reaching 85% or sometimes even 87.5% of my 1rpm I redetermine my 1rpm. Almost always if this standard of progressive overload is followed you’re guaranteed an increase in overall strength and the central nervous system is accustomed to a heavier load.

Once I have my new 1rpm I began again at 75% of that and lift until I’m at 85-87.5% of that. At some point you will be lifting your old 1 rep max for sets. This takes time and patience and you might not always make it to where you’d like to be at that exact moment but in time you will.