Hi there! Welcome to the game, I'm sure you'll love it :)

Have you played any games yet? If you're just getting into it, I would strongly recommend you play the core decks as instructed in the booklet to start learning the game. Then once you've got a handle on the core decks, start tweaking the core decks with new stuff!

If you've already learned the game, a good place to check out decks is NetrunnerDB. It's a deck building website with some great social features. One of the features of the website is a deck search function. On the right there's an option to filter decks by the sets you own. Plugging in Core, Second Thoughts, and Mala Tempora, I got these results. Maybe poke around on there to get some inspiration.

I'm sure other people would be more than happy to suggest some specific ideas as well.