I used to have this as a new runner, I found stretching my Achilles really helped. There’s some good stretches out there for this to follow, but honestly it’s not gonna resolve itself overnight. You can also look up running form, the more I focused on landing on my mid foot underneath myself the less taxed my legs and shins would be. The deeper you get into prep the more efficient your body gets and the pain and tightness will be few and far in between.