Dnb mixing & song selection

Hii ! Would massively appreciate some advice .

I have absolutely 0 music theory background. I took a 3hr DJ course in person several months ago organized by a rave club & their resident dj.

It was super fun & i managed to do some half decent mixing while under supervision.

Took notes on the process / theory / tips. Tried again at home (got myself a DDJ-FLX4 as a treat yoself), managed a bit, looked up some tutorials and just ended up confused.

Can you help me with creating a basic step by step process, so i understand wtf i need to do, get the hang of it and then feel it out a bit more?

What i've been told on the course: 1/ set memory cues, from when the music starts per 16 bars all throughout the song, as "bookmarks" for when you should start mixing in another song

2/ when you want to start mixing in another song, start 2 memory cues before the drop

3/ when the drop is approaching / i want to start switching the song, slowly fade out the bass of the first one while slowly fading in the 2nd one

What i'm confused about : Online tutorials said to use hot cues & start at the drop & then work backwards / forwards with 16 or 8 bars

Also how do you manage the sound levels ? Are both sides constantly on top volume ? or is the song currently playing on top volume, the 2nd song on low & slowly increasing as you fade in the base ?

Additionally i think i horribly suck at song selection for mixing. How do you choose / find songs with similar energy or that would simply fit ? (i know you shouldnt mix vocals & vocals ofc)

Some artists / djs/ songs i like : -Wilkinson: Machina -Noisia, Chase & Status (from like 15 yrs ago) -AMC, Friction, Pendulum -K motionz, Kanine -DJ Hype, DJ Fresh (also from 15yrs ago) -Catching Cairo, Pola & Bryson -Born on road, Vibe chemistry -Camo&Krooked, Youphoria -Subfocus -Bcee: so good -Calyx & Teebee, Danny Byrd (also from decades ago) -Fox stevenson mixes

High energy & stuff to jump around, bit of melody, stuff that just sounds like a hammer hitting a metal plate (hardtek style not so much)

Please help ? :D

Help with how the hell to mix, what to mix, finding songs.

The more tutorials i check & try to apply the more confused i get & just feel like i'm not matching the songs aaat all 🙏🏻