tamron 70-300

Hey all. I went out with my twin Canon R7s with my trusty Tamron 70-300 and 150 to 600 (G1) at Oulton Park yesterday. Notwithstanding that I didn't realise just how much muscle memory I had with the 70D, my keeper rate was absolutely terrible. In particular, I don't like what the viewfinder does...

I have decided to properly get into photography, but mainly lanscape, wildlife, the sea and most importantly the night sky. I have spent the last few months frustrated with you tube posts etc. I have a budget of £600 to get me started and what I researched so far is best entry level new would...