Need advice on tmm paints

Hi all, I am in the process of starting my second army as the 15th legion and have bought tmm hydra turquoise and sapphire blue to test.

Just wanting to know is it possible to do some mixing with tmm paints or will it look bad? (Specifically mixing the turquoise and blue together)

I also bought retributor armor primer a while back to try and save some effort on trim, how well will it go with tmm paints as a primer or should I use something else?

Cheers.