The actual value won't be critical. Rewinding it is one option and matching the wire/turns will give the right answer.
If you're 'getting into' electronics and repairs then you might look at collecting old, dud, equipment and PSU's. Those inductors are very common in many modern PSU's and a surplus one - even of the 'wrong value' - may well be suited to the job. But getting a decent test meter will also be a very important decision for you and provide the necessary test facilities to both check components and locate faults.
You're on the slippery slope to 'addiction' to electronics! It could well take you into a prosperous career in the future too......