First register for a DMR ID on
https://www.radioid.net/
It might take a few days to get your ID. You'll need when setting up your radio.
For HotSpots I have a JumboSpot. It's easy to setup but the web interface can be a little slow connecting at first, able to put in multiple wifi access points. SharkRF is supposed to be coming out with a new HotSpot rumored to have built in wifi this time but will probably cost more than the JumboSpot or ZumSpot.
As for the radio, you'll need to set up a code plug. Some people try to download ones people already built. I suggest watching a few youtube videos and making your own. It was straight forward and easy to me.
You may want to setup a Brandmeister acct also
digital contacts is where you want to put your talkgroups. I put in all the statewide talkgroups and then broke them down into a zone like like States A-G, States H-K etc etc and made Tac zone and put all the Tac talkgroups like Tac 310 in it.. Global Zone. Then a Digital All, Analog all.
Tac 310 they say it's one of the busiest channels,From personal experience on it it's 90% I just got this radio and doing a radio check and what hotspot are you using. 5% is ragchew and the other 5% is kerchunking to connect to the talk group. Although I did hear an older guy and kid argue about which is the proper phonetic word to use for a letter
I have an AnyTone 868 but I don't see much difference in program any of the radios I've looked at. Anytone has a new HT and DMR mobile they're about to release. It looks sleek.