If you have an SSB and a power rack do hatfield squats and hatfield bulgarians for high reps. Toss something like 85% of your back squat max on the bar and you'll be able to do sets of 15-20 on hatfields, and for the hatfield bulgarians you can probably start at 30% of the normal hatfields weight for high reps. Look em up, they're great. The adjusted movement lets you work your same squat stance and depth but with the option to use your arms and back to assist a bit as you get tired and the movement really lends itself to high loads. As you get more comfortable it's not hard to turn your max or even more into a high rep weight. 650 back squat, 800+ hatfields. This form also makes the bulgarian squats much more manageable since again you can modify the assistance from the arms and back to keep cranking reps out. The work is still hard, the weight must be heavy, but the legs will grow.