Demise, FWIW, please read this in regard to your 'sun/solar' filter.
http://www.iceinspace.com.au/forum/showthread.php?t=934
DO NOT USE IT....DESTROY IT!!! Cannot emphasise this enough.
As for 'collimating' your telescope & finder, do in the daytime as Mike said.
Take outside & find a fixed object, (pole, tower, etc), at least 500 to 1000 mtrs away. Line the t'scope up on the top of this, with the largest numbered, (eg; 20 or 25 mm), E/Pc in it. Adjust the 3 or 6 screws on the finder to line it up with the SAME object you have in the t'scope field of view. Put in your next E/Pc, (10 mm?), & check again that they line up. This will be good enough for you to find most objects.
A few basics, your t'scope is say, 900 mm long & you have a 25 mm E/Pc, therefor the magnification will be, 900 / 25 = 36 x. When you want to '
get closer', change E/Pcs. eg; 900 / 10 = 90 x mag.
If you have a 'barlow' lens, this will effectively double the magnification of each E/Pc. This is fitted into the focuser & the E/Pc fits into it.
The moon filter will 'dim' the moon a little, making it easier to see details.
HTH.....
L.
ps. Ask as many questions as you like. Lots of great people in here.