Overpronation help?

The arc on my right foot is pretty flat and make right outside edges very difficult. Any tips to correct overpronation?I’m thinking of getting insoles like theseSpenco Total Support Max Shoe Insoles, Women’s 9-10 / Men’s 8-9 https://www.amazon.com/dp/B008CJNV20/ref=cm_sw_r_cp_apa_i_MUV4AbQRB5GTJand wondering if they would be of help.Otherwise, are there like any drills/exercises I can do to strength my ankle/improve my right outside edge?Thanks a lot!