[erick (Eric)]

Great! You are under way!

Polar aligning - let's fix a few more things first, then get that sorted.

Is the Moon not coming into good focus. Depending how stable the air is it may be moving around like jelly, but you should be able to get the focus to a fairly sharp spot and it goes out of focus if you wind further in or further out. Use the 25mm eyepiece for this. If not, we'll have to solve that problem first.

End caps (sky end). Yes there are probably caps over both ends of the finderscope. They need to come off. Then for the main scope, take the whole end cover off. Yes, most have a removable cap that allows a much smaller aperture (just the diameter of the open hole, rather than the entire diameter. Forget about that - you won't be using it. You want the whole end open.

I'm fairly sure you are looking at Venus. Jupiter is too close to the Sun now. Venus will always look like a bright white object with no features in our small scopes. You are looking at highly reflective clouds. Given it is never very high and that you are looking at it soon after sunset, the "seeing" is seldom good so it may wobble around. However, you should now see that it is in a crescent form, like the shape of a crescent Moon. Watch it change over the next month or two. You may find it helpful to put the "moon filter" on the eyepiece, if you have one. Venus can be very bright through the eyepieces.

Getting the guidescope aligned. I expect you mean the finderscope? It can be easiest to do that during the late day on a distant TV antenna or tree - so the object doesn't move in the eyepiece like everything in the sky does. Get the object centred in the scope with the 25mm eyepiece. Adjust the finderscope adjustment screws until the object is on the cross hairs. Change to the 10mm eyepiece and repeat. Is the view through the finderscope in focus - sometimes that needs an adjustment. We can tell you how.

Cheers
Eric