It sounds like a massive cliché, but the best advice I’ve been given and adhere to is believing in myself, being genuine and nice. If you believe in who you are, what you want to achieve, and visualize it, you can do amazing things.
Initially, musicians used 808s on their own as the kick. While you can definitely still do that, things have progressed. Nowadays, the subby 808s are most commonly found as a bass tone that’s been layered with a punchy kick sound. This punchier kick layer typically has less bass content and is there to help create a crisper attack. At its most basic, the kick and 808 play essentially the same pattern, but the 808 bass provides the sub and tonal content.