Eric Rosen pulls it off because he is a formidable international master.
Pick a few sound openings, such as the scotch for white and the french and King’s Indian as black.
Do tactics puzzles and observe opening principles (avoid moving a piece twice in the opening, develop your knights and bishops, control the center with pawns, etc.) and do some puzzles.
That should start you off nicely.
I am new to chess and the game fascinates me for how much thinking is involved and so far I am trying to learn the Stafford Gambit but it's just not working are there any other "beginner" strategies in Chess that i should look into?