Help please!! Serial accidental house plant killer in crisis!

Hi all, Im really hoping i'm in the right place... I really love plants, and the idea of having a home full of them makes me really happy! Unfortunately I have not been blessed with naturally green fingers, and tend to end up killing every plant I get (cry)... Completely accidentally! Can you please help me to find some species which are SUPER easy to care for, and give me some tips on how to care for them! It would be much appreciated! P.S... I live in the Uk and its either constantly raining or its 25 degrees for a week at the moment! ( no in-between) Thanks in advance! Yours Sincerely, A wannabe Houseplant fairy kinda girl