Good resources for learning the Scandinavian and Vienna?

Well, I think John bartholomew's scandinavian on chessable.. There was a big sale and the course was like at 3 dollars, now it's back at a normal price.. Maybe wait for the next discount.

https://www.chess.com/blog/pfren/the-safest-scandinavian-by-vassilios-kotronias3
Being a 5 yo book it needs repairs, but they are few.

Introduction To The Vienna Game & Gambit...
https://www.chess.com/blog/RussBell/introduction-to-the-vienna-game-gambit
includes book recommendations.

Personally, learning the classical King's gambit lines with 3. g5 helped me understand the attacking ideas of the Vienna a lot more, but I dont have books or anything to recommend you

I don't think the 2 openings are a good combination. The Vienna is a really aggressive-Romantic style opening, while the Scandinavian is slow, solid, and caro-kann like. I think the most important part in choosing openings is recognizing your own playstyle.

I play the "Modern Vienna" just as Sergei soloviov recommends in his book. I would describe my playstyle as Dynamic and unbalanced. As white, I play much more aggressively and as black, I play much more provocatively.
As people's playing styles can differ by playing white or black depending on your chess philosophy, the middlegames should have the same characteristics in order to archive the most success. The common middlegame for me would be: unbalanced, dynamic, and tactical. As long as you can characterize your favored middlegame, I think you can pick your openings from there. As black against e4 I play the Alekhine, however, I would not recommend the Alekhine to anyone below 1600 rating, since I find the ideas to be extremely complicated. Otherwise, if you want a counterattacking defence I would recommend lesser-known lines in e4 e5.

Chess Openings Resources for Beginners and Beyond...
https://www.chess.com/blog/RussBell/openings-resources-for-beginners-and-beyond
https://www.chess.com/blog/RussBell