I'm quite jealous of buying a new weber, hope you enjoy it.
I use weber briquettes, normally pay around £10-£12 for an 8kg bag - they are normally more like £20 in most places so have to shop around.
This looks to be the best deal at the moment.
https://www.wowbbq.co.uk/product/we...JxV5QFjNrZt0GRNMzds8E3geIkOQN_nwaAgOwEALw_wcB
Other usually recommended one is heat beads, and this here looks like best price
https://www.bbqland.co.uk/10kg-heat...NMqkzZDWytGHtdSrO0GCNcOj9Qk7xwjgaAjicEALw_wcB
For recipes and tips, check out amazingribs.com, there's so much to read and learn
I have just ordered it, from wowbbq actually, with the starter kit and an extra 8kg bag of weber briquiettes.
Ill add it onto my list of several sites to check out, its coming friday which is a shame as this weekend is forecast for lower temps and rain/clouds so i may not even get to use it till our next warm sunny spell but atleast ill be prepared this time.