How approachable is this game for a long-time TF2 player with 0 MOBA experience?

This game aesthetically scratches a hyper-specific itch for me with the whole 1920s occult theme.

I love class-based shooters, given that I have over 2.5K hours in TF2 and quite a lot of playtime in Overwatch before they trashed it and awkwardly stapled a "2" onto the logo with bubble gum and band-aids. However, I absolutely despise MOBAs and avoid them like the plague. It just seems there's a billion things to keep track of that are horribly communicated to newer players.

How should I approach this game?