Help! Give me some advice

I'm trying to get all my on-line communications and connections organised so that they work for me and not against me, especially as I cant sit at the computer for long periods of time as it causes stiffness and pain in my back and shoulders.
There seems to be plenty of free stuff out there that I am happy to take advantage of it, if It works for me. I seem to have more questions than answers and Im getting rather giddy so, if anyone can throw in their pennies worth, or if you know someone whose got it all happening and they didn't pay an arm and a leg for it, I would love to hear from you.

This where I'm at right now...

I already have a Facebook page and Twitter, that I 'm presently not using. I'm wary of both of these because I don't need or want to expand my social networks (apart from family and close friends) but I do want to connect with art and creative movement groups.

I had a really good web page with Mac using iWeb but now that has changed to iCoud which I couldn't operate with my old lap top. I do have an ipad now so I may be able to resurrect it again. There are also free webpages through Wordpress or Google that I have been browsing but they are awfully time consuming to set up and I'm not even sure if I need one. Perhaps I should find the most basic template and work with that...if I do need one.

Then, I need to work out if my on-line shop for selling my artworks will be an option or link on my existing blog or do I set up a free web page for this, or use my already existing ETSTY shop which needs updating. I also think Facebook can be used as a shop..not sure?.

I currently have 3 blog sites. One about 'me', the second about 'Creative Movement' and the third is about my 'Art career'. I'm happy with that set up BUT I would like to show links to these on each individual blog. Haven't worked that out yet!
Id like to have a viewing platform for my completed artworks on the 'Art career blog' but I need to be able to set up Pay Pal.

Do I need facebook and twitter links for my business? Do I need a shop?  Do I need a webpage? Do I need another blog? Help!

If you think you can give me a few pointers or suggestions, I would love to hear from you.
My email add: janetpfeiffer@mac.com