I agree with the fact that Portuguese speaking people can understand the Spanish speaking people easier than the other way around but if you already are at an advanced level of Spanish then by all means, it isn't that difficult. I spent a total of 9 months throughout 4 years (long-distance shit) in Brazil and after my 3rd visit I could pretty much understand everything and that was before I learnt Spanish which I nowadays speak fluently. There are so many words to associate with that it isn't really that tricky when your English is basically native or advanced and on top of that you have an advanced Spanish, then Portuguese will not be such a challenge if you actually put in the effort.
Beware that the Portuguese spoken in Portugal is way different than in Brazil, in my ears it sounds way uglier in Portugal.
Good luck!
Beware that the Portuguese spoken in Portugal is way different than in Brazil, in my ears it sounds way uglier in Portugal.
Good luck!