You need to be aware that Wise is a multi-currency account. You need to "open" an account for each country you're interested.
That's why I always specify Wise US account. If you go to the Wise website, you can see images with different country flags in the app - each flag represent an account.
E.g. a person can hold:
100 USD
150 Euro
50 in SGD
200 GBP

All at the same time, within the Wise app. There is not just one WISE account, but it depends on how many account/countries you wish to open (AFAIK it's one account per country).
For me and likely for you, there is no need to open a Wise MY account since we already have a local bank. In your case, you would need to tap and "open" a US account within Wise first, which will give you the US account details you can forward to the sender in US.

Paypal don't allow transfer USD to wise. they will do conversion. rate similar like transfer to local bank but wise rate is better than bank.
transfer fee is free if above usd98