do not get overwhelmed with projects. Especially as a (relative) beginner, the feeling of quick success is important in taking on the next project.
Be your own psychologist: Give yourself the good feeling of "making it", then start over on your next project. Your confidence will grow.
For that next blanket you want to do, you can already start the planning, though.
I looked at the logo of the Denver Broncos. This is doable if you know about knitting with different colors. You can do a stranded work or intarsia work (depending on the size of the logo(s))
My question is: you you really want that picture in the blanket? It might be a lot for an intermediate knitter....
Might the blanket be perfect with just the colors? in blocks or stripes? That would be a lot easier. blue orange and white seem to be all you need. Or just blue and orange.
The other thing might be to do the writing of the name as intasia... let us know where your plans run to.
The other thing that WOULD be a fun team blanket would be to design the blanket like a team shirt, with the number and the name on it and the design features of the season shirts... (like the back of this shirt: shirt)
Sorry, I live far away from Denver (in Germany actually), so I do not know the player I linked the shirt of. Maybe that is the wrong player to be a fan of or something... just take it easy with me on this.