So my wife has a 10 year old low end notbook. 500Gb of storage (HDD), 2GB of GDR3 RAM, and an intel Celeron Processor N2806. It originally came with Win 8, then she “upgraded” to win 10 and after that it was pretty much unusable. I am talking CPU and Ram about 80-90% in idle, opening a browser got everything down to a crawl. She mostly used it a storage and brwosing, watching youtube and occasionally to write. So I (also a Linux newbie) finally got the time to install a newbie friendly Os (Fedora) and it’s so much better! I am Talking 20%CPU usage and 50%(?) RAM in idle.
The SSD will make for a very big difference in loading and operation speed, plus filling out the RAM, everything is going to run so much nicer. If the socket can recognize all 8GB, it will be a nicer experience.
I would suggest you have a look sometime at Devuan for consistant stability, light on system resources, and if you using the testing branch you’ll never have to install new releases, you only have to do an update.