Went through a brief online lesson on power chords, it seems all you do is fret the root node which is the actual note you want, plus 2 other notes on the same fret with a space between from the root node, under the subsequent strings next to the root.

The lesson uses a 3 finger approach but I couldn't do this properly especially when moving closer towards the pickups, so I have 2 choices, fret only 2 strings (1 root and the other) or fret the other 2 notes with 1 finger, the ring finger which is what I did, and found it much easier without involving the 3rd finger (pinky).

Is this all there is to it to power chords ? Just fret a root node and the 2 other notes (with ring finger).

Fingers are not 'strong' enough yet, need to get used to moving them apart this far and pressing/holding down harder for the ring finger to fret 2 strings.

That was what the lesson thought but I find it much harder to get a clear note, especially when you move downwards near the pickups where the fret spaces are ridiculously small.

I have big hands also. I rather build a strong callous to fret 2 strings with 1 ring finger though, and it's faster/easier to coordinate and move fast imo to catch the right chord.