You can buy bitcoin in this forum as well. You can buy with paypal, skrill, netellar. Check the marketplace of this forum and find out the best method for you. Don't forget to use escrow.
Would be a good choice and I would also always recommend to use an escrow. According to
that list most escrows charge a minimum
BTC, not depending on the amount you want to escrow. So I don't know if that would increase the percentage of fees too much for you. I know someone from the German section, he was doing escrow for free for a time but can't say if he's still doing it:
https://bitcointalk.org/index.php?topic=1466069.0 (Last edit March, 28 2019).
If you're from a country where some ATM are around you can also try this. For low amounts KYC isn't required sometimes (depending on the ATM):
https://coinatmradar.com/Is it really that hard to exchange currency for bitcoin or am I missing something?
Other way round it seems to be easier when you want to cash out. For withdrawals Bitpanda from Austria doesn't need KYC for low amounts. They've different tiers depending on how much you want to sell. But buying BTC without KYC is also not possible there:
https://www.bitpanda.com/en/limits