Installing cartr.:slide it all the way to front?

The position of the cartridge determines the overhang, Overhang :^).

If you have a tool to check your set up, you need to acquire one.

It matters much. If you don't have the tools to setup a TT properly you need them. It is not an easy process. If not setup properly you will get less than optimal sound and probably damage your vinyl.

Your arm or turntable manual should tell what the overhang should be. This will hold you over until you get an alignment device of some kind. Overhang should be measured form pivot to stylus tip.