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Keyboard, Controller And Sound Card Advice?

Hello, I am new to making music on my mac. I used to use an old Tascam 4 track player back in the year dot.
I have a macbook pro here and logic express and garageband installed on it.

I am wanting to start to make my own music, mostly electronic music with great basslines, drums and guitar sounds, keyboard sounds etc. I would lilke to ustilse the keyboard or mouse/software interface for playing these virtual instruments and think I would also like to be able to record some vocals or guitars in in the future.

Can I please have some advice on what equipment I would require to start to make layered music with these different instruments on my mac.
I feel I need a nice keyboard (possibly portable one?) some great samples and software for drums, organs, guitars etc and the right sound card to get my music laid down as professionally as possible.

Many thanks in advance for any information about this. Also I am in the UK so any links to onlline stores to purchase this equipment from might be useful also.
Thanks alot for any advice,
Al