As
@Smudge617 said - don't be too hard on yourself and one of the reasons some of the "buggars make it look easy" is because when it is all said and done - it isn't that hard - building kits and doing scenery that is.
Kits come with instructions sooooo, if yu can read and interpret pretty pictures - you can build a kit. It really is that basic. Um well - that of course depends on the quality of the instructions and some of them are atrocious that not even an engineer could read them - but I digress - building kits is easy
As for the scenery - that isn't hard either as there is NO wrong way to do it. No matter what you do, scenery wise, it WILL represent to one degree or another, some where in the world - now they may not have found that some where yet BUT it WILL be there some where
Fact of the matter is that scenery is easy and there really isn't any right or wrong way to create it. If you want to know how something has to look - look outside ...
Now sure, some things can be done a bit better at times BUT that comes with practice and experience. Never forget that we ALL started some where. NO ONE woke up one day and was an expert at this hobby - no one! About the best advise I can offer is if you get stuck doing something - ASK! Simple as that