First of all, welcome to forum and I have to say that you chose a very good time to buy your first bitcoin.
Indeed knowledge is power, because knowledge can save you when money failed, because knowledge failure is a lifetime problem but money failure in terms of investment is temporally and if I wait I will soon be in profit again very soon, that is what past records have shown and proven.
Regarding this "I will be in the profit very soon" part, that doesn't have to necesasarily be true as it may be even years before bitcoin goes back to the levels where you bought it so you should be be prepared for that scenario as well. Having said that, since you bought your first bitcoin much cheaper than ATH price was, chances are that you won't have to wait for years to be in profit.