You should have bought it with a credit card. Instant purchase and fees are lower for your amount.

I would suggest that you buy at least 10 DOT and lock stake them. 10 is the minimum amount of DOTs that you can lock.

For a month you get 15,79/12 = 1,3 %
The return for ADA is 5something% for a year and you have to lock at least 5000 ADA which is a quite lot.

DOT has one of the best returns when you stake it, plus you get one of the hottest projects of 2021. I see 5x-10x from the current price.

Keep it for six months and for every 10 DOTs you get almost 1 for free.

Pretty good deal if you ask me...