Hey deezee,
The above post about keeping your elbow up is very good advice. Keep it up and your blade should stay upright along the ice and will give you a bit of leverage when you shoot.
Don't always pressure yourself to have to make a pass. Accurate passing in these situations can be very difficult, especially if your teammates are not expecting it. Many times, all you have time to do is keep the forward from getting the puck, so get there quickly and simply try to smoothly shoot it away from them. Keep your head up and try to elevate the puck up and away, using the other players forward momentum against them and don't be afraid to bump them if you have to
Even though you don't have an opportunity to skate alot, you can still practice some of these skills off the ice. Roll or kick tennis balls against your garage doors or basement walls, and run up and try to play them off of the rebound. While it is not a skating motion, you can practice readying your stick, keeping it down, and keeping your head up as well as your shooting and passing. Even better do this in rollerblades, and have a friend or family member rool them at you, then race you for it. This isn't perfect of course, but it gets your mind and body conditioned to recognize and react to those situations.
And lastly, don't beat yourself up too bad when you do mess up. Lord knows I know how it feels when it happens, but it does happen, even to the pros so don't let it get you down!
Hope this helps! Good luck out there!