Thanks again for your reply and for taking the time.
I currently use Grafana connected to InfluxDB on a VPS and I can plot all graphs I need on Grafana, so that seems easy enough through the interface and it currently all works for what I need.
I also have Grafana, InfluxDB and Telegraf installed locally on my Window 10 laptop and I can connect from Grafana to InfluxDB locally and create the charts that I need. Problems for people like me start when I start wanting to import CSV files, etc. where the concepts of using a plugin for Telegraf, etc. come into play.
It seems that for what I need InfluxDB is probably not the right tool for me, but I will give it another try with the documentation as suggested.
thanks
