You have plenty of options for lift variation for Westside conjugate style lifting.
You have 3 or even more different grips you can use. You can make or buy boards for board pressing. You can floor press. You can buy some bands. You can buy yoga blocks use those as a kind of board press. You can make a ghetto slingshot out of bands. You can do dead benches at various heights. And of course the various combinations of these.
For squat variations: if you squat low bar wide stance, you can squat high bar narrow or vice versa, front squats, you can set up a box with aerobics steps, you can use bands, you can use a heel lift or omit a heel lift you use WL shoes already, you can set up the box at different heights and you can do the different kinds of squats at different heights. There's also zercher squats. You can pause squats too.
For deadlift, you can use power rack pins at different heights but I'd keep bar below your knees. There's deficit pulls, snatch grip pulls, sumo or convenional and combinations of these. Some people like max or heavy effort good mornings too.
5/3/1 or Texas Method might not be bad if you want to keep it simple. You could also try Ed Coan's approach. You can find programs and calculators online. You could also make a program based on Prilepin's table or just do a starting sheiko program. If you make one based on Prilepin's table, just set up a heavy, medium, and light and/or speed day.
Also, your form might be holding you back.
How long do you stay on any program at a time? Program hopping can mean death to progress.