Many people these days recommend wasabi wallet as a bitcoin mixer.
But you should consider that the method it uses to mix your bitcoins are not proven to be safe.
The main problem with wasabi wallet is the change outputs, if you ever combine any of your change at a later point, there is a big risk of having your coin joins deanonymized.
Also re-combining mixed outputs is a big problem, it is really hard to tell which size is ok to re-combine or when chain analysis companies can uncloak your transaction history by using all the data available on the blockchain.
So better wait until wasabi is a more finished product.
And in the meantime use one of the bitcoin tumblers listed on the main page.