Why shit? 8 cores is more than you'll ever need sitting on your lap, 2-4 was the standard in the past for a long time. And 4.8 ghz turbo is amazing. More base ghz and you'll need a fireproof thong to work with it
RAM to improve performance. Faster processor will not be useful for most tasks but RAM will help you keep more than five chrome tabs open. SSD can upgraded if you don’t back files up and delete them from machine very often.
Doesn’t seem like you need to upgrade anything right now, but Macs serve you a long time and MacBooks are not officially customizable after sale, so you may eventually regret not upgrading. I would definitely upgrade storage and ram for long term use.