Just give it a shot for a 6 weeks, dont miss a session, eat well, rest well, put in plenty of effort. You will feel better than you ever have.
Do a few sets with an empty bar to warm up for each exercise.
Start on squats, add say a 5kg plate to each end and do 2x10, if you do it easily, take them off and add 2 10kg plates and do the 3rd set. If you do that easily, start with a 10 and a 5 on each end next session. You should be aiming to struggle a little towards the end of each set, this is where the effort comes in. If you complete 2 sets of 10 and the third set you only manage to get 6 reps in, thats ok, just make sure you do 7 reps next session, when you get to 3x10 thats when you can put more weight on the bar. This applies to every exercise!
Its important to keep adding either more weight, more reps, or more sets every exercise, every session
The first time you do this is just to get a feel of what weights to use, it will happen, you can be sure of that.
As a guess, give these a shot for your working sets. Remember to include the weight of the bar.
Squat - 40-50kg
Bench- 25-35kg
Bent row - 40kg
Military press - 20kg
Deadlift - 60-70kg
BB curl - 15-20kg
You havent improved for 2 years, it doesnt matter what order you put your isolation exercises in, you need to try something different and get stuck into the compound exercises, and eat more!
You wont get huge overnight, but if you do this for 6 weeks and you will notice a difference