Is this too crowded of a garden to be fruitful?

I have a space in my yard with full sun all day, and I’d like to start a small garden in it.

The squares in the diagram are 1’ each.

I have never gardened before outside of standard yard maintenance, but I’d like to slowly work up to something like I have in the picture.

Is a garden this diverse and compact feasible? For some reason I feel like it would have hindrances.

Thanks!