I went out and bout myself an ohm reader even though I had a PV that reads ohms. Multi meters are great because you can use them not only to read ohms but also to check battery voltages and such. Not sure where you are located in the US but I bought an inexpensive one from Harbor Freights for about $10USD
Best advice I could give is what was given to me when I started using mechs- Do your research on
batteries, learn about ohms law.
Lot's of great info around here, check Baditude's blog
here The guy is an encyclopedia of everything
vape