Could you give examples of texts that you find too advanced? This will help to recommend.
Have you looked at any Oxford Chemistry Primers? These are small, concise and cheap. Some are quite advanced, but there are introductory texts in all branches of chemistry.
Here is a list:
http://www.oup.co.uk/oxfordtextbooks/chemistry/ocp/In the Organic series, for example, there are two primers by Hornby & Peach on the foundations of Organic Chemistry aimed at finishing high school students, one being a collection of worked examples. I just checked the US amazon and the former is available second hand for $4, the latter for $15.
Similar "foundations of..." and "essentials of..." primers also exist for inorganic and physical chemistry, as well as mathematics and physics for chemists in the Oxford Chemistry Primer series.
A general chemistry text is also probably a good place to start.
For Organic specifically, beyond the foundation primers I've already mentioned, I would recommend "A guidebook to mechanism in organic chemistry - Peter Sykes" - currently $70 on amazon (US), and there are two auctions currently going on the US ebay. I think this is the best text for a first year undergrad for organic - but you will probably outgrow it in a year or two. It isn't a pretty colourful book, it has very old-school schemes etc., so it is visually a bit offputting at first, but the content is generally top notch.
Next up is the famous "Organic Chemistry - Clayden, Greeves, Warren & Wothers" - currently going for $50 on the US amazon. This is a very popular organic text, and rightly so. This one is colourful and has a much more modern presentation. If you're the kind of person who writes kaleidoscopic lecture notes (I'm not having a go, I'm just saying), then you'll get on especially well with it - but it's worth getting hold of in any case.
I hope that helps, good luck.