until you understand the tools and why you need to master a track, eg finishing of an album..I wouldnt even bother with it...
the tools you mention in the mastering suite are available in logic....if its just volume you want adding loudness is pretty simple, stick a compressor on, put a limiter on after it....
but if its making your tracks sound much better id imagine than some of the problem lies with the quality of your mixes, and that has to be done to the very best of your abilities first, mastering single tracks is little more than finalising, adding a bit of polish...its should alter then sonically that much
take an active part in the mp3 clinic, then people will review your mixes and point out anything lacking...but dont go through all the work of producing or mixing a track to leave it in the hands of a preset...seems plain wrong