Slow burn to start but then moves along with pace Origin stories can be a bit hit and miss in the marvel universe. I went with my daughter to see this overthe weekend, and whilst it's not the best of the MCU movies, it was fun, entertaining, full of action and had a great soundtrack.
I could have lived without the first 20 minutes and they didn't make great use of the acting talent on show.
If you have seen some of the more recent movies, there are no surprises in the storyline as you have been exposed to some of the characters previously.
Just go watch it and be entertained. Marvel for the most part is a feast for the eyes and not challenging to the mind.