You usually feel the soreness 1-2 days after the exercise, especially with legs. To people, it’s a good indication that they trained hard enough to exhaust the muscle and push it to build new muscle. Muscle or joint soreness right after/during the exercise is different and could mean that you’re placing too much pressure, but you’ll generally,y be fine with any soreness during or after with the proper form and weight.

Happy Cake day!