Thanks for this info, should I be OK in the meantime despite my initial over-cleaning?
Do not worry but stop doing what you are doing. If you have removed the coating of the lens what are you going to do about it? Send the camera back (assuming you bought it on-line) saying you no longer want it? It would not be ethical but there again many people are not ethical. Just use it.
What you
must not do is keep rubbing the lens clean as whilst you remove grease/wet marks you will be introducing dust, dirt etc. and you do not want to be cleaning grease with something that has dust ... that can scratch the lens. It is the dust and "sand" that is around you that you don't want to rub in the lens whilst the dust/sand on its own it is causing no deterioration to the photographs you take. If you must clean it use an air blower
here are some examples. Use the camera, go a step further and get photos printed, and then hang them on the wall and stop just admiring your work through a screen. Get pleasure from what you can do with the camera, it is not a museum piece.
If you are in doubt put a filter on the lens. Hoya, Schneider which I think now is B&W, and another make that escapes me are the brands to have and from within those brands you got to find the better range. There is an endless debate if filters actually result in lower quality photos ... they probably do but if you (or I) can't see the difference you pay your money you take your choice. I got filters on mine and I am aware photographing against the source of light they may increase the issues, there again I may like that increase of issues (people screw up their photographs in lightroom I am entitled to screw them up with my filters
). There will always be a sharper lens, a better camera, more megapixels, a longer lens than you got, a bigger aperture than you got, so what? Those things would be important if you have reached the limitations of what you have and you have got plenty of spare money. I took better pictures with a twin lens reflex camera (Lubitel) with no light meter than I got with my two subsequent 35mm cameras because my exposures were cr@p. My pictures got better again when I used a Weston Euromaster light meter .... My final word to you is to use the camera and do not treat it like a possession to be admired in a glass case.