Toning/Strength

Hello everyone! I am new to Pilates and currently only have a mat. I have not worked out since I had my two little girls. I have lost all the weight that I want, and now want to tone and gain strength. I chose to start with Erin Wilson's beginner's playlist. I am about to do the 5th video. My question is where should I go from here? Has anyone been in a similar situation and been successful? I would love to follow in someone's footsteps. I know I can pick any video, and something is better than nothing, but I prefer an organized plan. I am willing to purchase more equipment like the resistance bands, free weights, ring, and ball. Any and all suggestions are much appreciated. Thx!