HTML, CSS, Javascript

What I found difficult was allignment of the divs for the header I made. I also found that producing that javascript for the hovering over the projects a bit challenging. I was able to make it work but I feel it can be better. Instead of hearts or anything I would like to know if I could get some professional feedback as this one is a junior developer project and I would like to know how I did and if I could do anything better. Thank you for any feedback that is given. I would like to improve this site if I can. Thank you