Do you mean to tell you about the best methods for buying? I'd use one of the top crypto exchanges, but be ready to pass KYC.
that's the problem with this thread there is no clarity if what is really asking by the OP we all speculating about what is the true needs upon asking this.
but you have mentioned exchanger on what?of course only exchange can offer us Buying and selling not unless P2P options.
better for Him to use either exchange or if there is some place like Local wallets(if available in their locations)
for OP buy now or be late next year since halving is coming.