Hello /m/, I need gunpla advice.

I'm very inexperienced when it comes to gunpla and models in general. Pic is my first and so far only attempt. However, what with the HLJ sale on at the moment, I'm interested in buying a few more sets.

My question then is: what equipment should I get for building gunpla? I used sandpaper and nail clippers on the Rick Dias because I didn't want to spend too much money all at once, but experience shows that this wasn't the best idea.

I'm preferably looking for something that you can just buy in your average hobby store since shipping rates and customs duties to the UK are obscene and I'd like to avoid importing extra stuff if necessary.