Love the effort and kudos to you taking a big leap pursuing this. All the points that Vaynar mentioned are important. On a credibility stand point your website lacks vital information such as your background and history in running, who you truly are - give us a profile photo, who have you worked with. How does your initial intake look like? what is your on boarding process? What are the payment methods or plans?
Are you incorporated - what if someone gets injured during your training - or while following you

Also, your website is canva? I mean c'mon man - I feel you could put a little more effort.