Should I train to failure?

Mostly no. You can build muscle and strength finishing sets with one to three repetitions still in reserve, and you will recover better and stay safer. Going to failure now and then on safe exercises is fine, but it should not be every set.

Avoid failure on heavy compound lifts and on any movement where your form breaks down before you stop.

Want this applied to your body and your week? Message me what you are dealing with. No pressure, no obligation.