Working the stitches at the tips of the needles isn't a problem and can make things like working two or more stitches together easier. They need to be moved to the larger part of the needle shaft for helping size them. I make sure the new stitch is moved up the needle before making the next one. It will all work out for you, it's just a matter of getting used to things and having a way of doing it become habit. Some people are tight knitters, some are loose knitters, and there are those that fall in between. If you can comfortably knit and purl and work your decreases and things, that's really all that matters. You'll find your comfort zone.