If you don't want to use mixers for some reason, then you can try to make several wallets (5 or 10) and mix coins by sending transactions between them.
I think it's too much to ask from a person who was asking to know a basic response of mixing coins to exchange.
OP. from which group of people you want to hide yourself?
If this is authority/government then use mixers. If this is hiding your coins from regular internet users then I think using exchange is not a bad idea but make sure the exchange has no negative term for mixing coins.