I agree that you don't necessarily have to spend £££ to get good results.
A skin care regime is basically how you clean and moisturise your skin.
Over the years I have tried all sorts of expensive facecare from Clarins to Liz Earle to rosehip face oil to Neal's Yard to Clinique. I have to say some of the Clarins stuff was nice but it didn't do anything magic. I believe that for some people, too many products and poking around with their face, peels, brushing, etc does more harm than good and can really irritate sensitive skin, which is what it sounds like you've got.
I wash my face with a foaming cleanser (Johnson's), use an exfoliating facewash once every two days (also Johnson's, very gentle). I use Oil of Olay face cream for Normal/Dry skin with SPF15 which I am quite generous with and I recently introduced an eye cream (Nivea Visage). Every so often I do a face pack (brightening or clarifying depending on what I feel like).
I can honestly say I have great skin and do not look my age. From friends to total strangers to work mates. Nobody believes my true age and they are not just being polite - I'm in my early 40's and don't have the eye lines or forehead lines. I have used an SPF for probably 20 years+ though and always take face cream down to my neck and decolletage.
I believe that rubbing at your skin with cotton wool + cleaner isn't very good for it, whereas facial washes are a lot lighter on the skin. The other tip is an SPF, always. Some of the moisturisers (Clinique for example) don't have SPF's in.
If I were you I would go around all the beauty counters, explain your skin problems, let them analyse you and see what they recommend. If you feel awkward about not buying, you can always say initially you will be visiting several counters to try and see what brand you feel would suit your skin best before purchasing, then you are being completely upfront and they won't expect you to buy straightaway. You might find they work harded to get you to come back
but don't feel guilty if you don't.... you are entitled to shop around before making a final decision.