Help with discrepancies between full and mobile design

So I get that the theme is responsive and automatically adjusts to the type of device and screen size of the end user. That being said, there are a few discrepancies on my site that I would like to request help adjusting, if possible. The site is bryanpoulsencomposer.com

1. On my “biography” page, the main image on the right side is underneath the text on mobile, which is fine. However, the image is way too small on my phone screen. It doesn’t need to be large like it is on the desktop site, just big enough to actually see.

2. In the short bio section on the left of my footer, my name and the text and image are centered in the desktop site but inconsistently left-aligned on the mobile site. What do I need to do to make the footer items line up like they do on the bigger screens?

Thank you,
Bryan