Hey trick,
If you're going to forge and your friend is an experience smith, I'd use what he's comfortable with. Unless he tells you to go to Lowes and get some steel. Then I'd get a new friend. ;~)
Seriously, if your friend doesn't have a preference I'd use W1, W2, O1 or 5160 if he is a good enough smith to keep you out of trouble. 5160 can be tricky for the beginner, but it's great steel. O1 is about the most forgiving oil quench steels for the beginner to forge. And W1&2 are very forgiving for beginners to forge and water quench. It only comes in round or square bar stock though.
1084 and 1095 are good steels, but I think you'll be happier with a blade to keep and use made from the steels I mentioned in the long run.
Look forward to seeing some pics.