Well, it really depends what your problems are and how much you already know about Linux (or *NIX for that matter).
If it comes to deciding which
mode to choose you won't find help anywhere else. The installation of TC (and MC) is rather unique hence carefully reading the
concept and
FAQ pages is essential. Likewise searching this forum (and the Wiki) should be the first thing you do. Please bear in mind that TC is still in a rather brisk development phase, hence not all Wiki entries or (older) forum threads are up to date. I for one always use the "Most recent topic first" search order. Whilst that might not always be the best heuristic I personally think it has worked well for me.
In case of generic setup questions (e.g. color preferences in an application) other sources should be able to guide you equally well. Likewise if it comes to questions re. parameters and options I usually consult some
online man pages. Due to the minimalistic approach of TC/MC you typically don't get the documentation included in an extension. Often it's available as a separate extension, but I rarely want to have it installed.
Furthermore, don't forget that not every extension contains a GUI application (for which one expects to see additional icons or menu entries). In my case the majority of installed extensions are CLI ones. So if you don't know what to expect from a particular application you could take a look at their web page first (or try to consult Wikipedia).
And finally:
Asking questions the smart way is highly recommended. Also for me the very best way to "play around" with an unfamiliar distribution is to install it in a VM (e.g. using VirtualBox or QEMU).