Hi use Hahnemuhle Watercolour Paper 300gsm I also use Arches 300gsm and Saunder 300gsm, I would suggest using and medium quality paper at 300gsm for your practices then use a good quality one for your special attempts! Good Luck Andrew
ps here is a link to where I get my Hahnemuhle Watercolour Paper
https://theartshopskipton.co.uk/hahnemuhle-watercolour-paper-300gsm-25-x-32-5cm-40-sheets-pack