Quemuel Vital Personal Portfolio - Feedback

Hello friends,

I’ve finished my portfolio and really want you guys to review and give me your opinion.
More than the visual interface I would like to know if my writing is correct if there are any redundancy and unnecessary tags, CSS selectors and rules. Also, is the content appropriated? Should I mention only my web stuff? Something to delete or add? And it could be my real portfolio?

Link: My portfolio.

PS: My pictures inside the flexboxes are overlapping the nav bar when the mouse is placed in the top of them, this started when I added a blur filter. Does anyone know how to solve this issue?
Thank you all