Yup all the above is great advice. I will add the main thing you will want to do is cycle the reps after some time LOW and heavy going fo new PR’s do some time at higher reps 8-12 to bring the tendon strength up.
something like this works pretty good. start with say 80% of your 1 rm, next week use 90%, next use 70%(unload), then last week New PR. then readjust and use the new PR for the next training cycle start @ 70%, then 80, then 90, then 70, then new PR.
so for you being 200lb bencher it would look like week 1 160lbs, week 2 180lbs, week 3 140lbs, week 4 new pr well say 220. you would then do 155 70%, week 2 175, week 3 200, week 4 155, week 5 new PR. risne and repeat.
This will give a nice mix of reps and loads and being still young in training age you set to have HUGE increases.
what ever you do just be sure to keep going back to the higher reps with the new higer loads to allow the tendons time to catch up.
oh blanket guess on how much by christmas being 7 months away. man really depends on you eating etc if your eating to GAIN or waht not but ill go average for someone in your situation and say 50lb increase, meaning if you slack off and dont eat or try to stay at a lower weight due to goals etc then could be less. If you eat like a horse and train hard and smart could be more even a LOT more.
Best of luck,