Watch a little kid build with blocks. No plan, no fear, no audience. Steal that energy.

Small kids make things with no plan, no fear and no sense of an audience. They are not braver than you. They simply have not learned yet that the work might be graded, so nothing gets edited before it exists. What you lost was never ability, it was the freedom of working for nobody in particular.

Give yourself one session with no plan, no reference and nobody to show. Start with a shape and follow wherever it goes. Stop when you get bored rather than when it becomes good.