The spoon method is great for daily wear, but as you’ve discovered, it doesn’t work very well if you want to masturbate with a bare glans.
One simple option is to retract your foreskin all the way, and it hold it back at the base with one hand, and then use the other hand to masturbate.
Another simple option I like is to retract my my foreskin, then wrap my thumb and finger tightly around my penis just behind my glans, then tug back and forth. Then skin won’t move and won’t cover the glans, and the thumb and forefinger stimulate the sulcus, the frenulum, and the back of the corona, and the glans also gets a bit of indirect stimulation from the tugging.
The very best method for masturbation in mh opinion is the tape method. This keeps the skin securely held in place and tightly retracted. It exposed all of the sensitive inner foreskin and the glans. And it allows you to use both hands to masturbate however you like.
If you are new to retraction, you’ll probably find that your glans may still be too sensitive to direct stimulation, so you may want to focus on the frenulum, inner foreskin, and shaft at first. Once you’ve been retracted for awhile, your glans will become less painfully sensitive and you’ll have more options, including rubbing your glans and shaft dry or with lube.