One good way to stay upto date with hardware is to be a part of online communities that specialise in such stuff.
Why? It’s a good way to get to know what other people are building, and it’s a good way to ask questions if you get stuck. Several of them hold competitions and it’s a great way to win some free hardware too
Hackster and Element14 are sister sites, owned by the same parent company. Element14 is one of Raspberry Pi’s main resellers across the world.
Hackster is more focussed on Hardware based projects.