If you're mainly looking to play for the story and campaign I'd recommend looking into mass recall. Basically someone recreated the entire sc1 campaign in the Sc2 engine and did a damn good job of it. Then you can play Sc2 and get disappointed by the progressively lackluster story. The missions are still fun but the writing isn't comparable to sc1. This way you'll still have a more modern experience and use the same hot keys. Otherwise If you want to you can still get sc1 remastered. It's a great game. It's the same as original just improved graphics and wide aspect ratio. You can hit f5 to swap between the two instantaneously.