Again, form is key.
It doesn't matter how much weight you're moving; if you're doing it wrong, you're not going to see results where you want them.
Watch form videos for every exercise, focus on form.
Here's my favorite bench press form vid. It covers just about everything, from equipment to setup to range of motion, and also covers WHY you need to hold key aspects of your form:https://www.youtube.com/watch?v=esQi683XR44
Key Points:>1. SQUEEZE YOUR SHOULDER BLADES TOGETHER (see 6:35 in vid)>2. Proper bracing/breathing (see 6:52 in vid)
The first time I followed proper form on BP I had to deload 25% because it's honestly a lot of work to get the form right the first time you do it, and if you push yourself too fast your form will break down and you'll hurt yourself.
Do yourself a favor and learn to bench right, or you'll be kicking yourself down the road when you strain your support muscles, or god forbid tear a rotator cuff.