I had more luck running her as an adc when my top and mid are squishy AF then as a jungle this season. Pretty easy to collect marks in lane but your ability to get camps besides scuttle is really weak so you end up needing ganks when its up.
My only tips for her in general are to learn a few mechanics like how long it takes for mark to pop up and try to minimize the amount of time it takes so your able to grab a mark with minimum amounts of forecasting, or play the mind game a few times each round where you mark 1 lane then gank a completely different one so your opponents wont trust that you will gank when they see a mark. Use her W and Q to kite camps and avoid as much damage as you can, always be kiting camps so your hp will be higher early game and you can gank better. When your enemy is in an R with you and is at the low hp cap off, try to set up and E with 2 charges so you can instantly Q + auto to trigger damage.
Once game times start going longer she will fit better in the meta, stuffs a bit to snowball at the moment for her to really shine imo.
Edit outch, ran her as adc in lane and forgot how brutal it is when you cant hit 4 stacks early game from getting solid ganks or winning lane. Came back to give warning that its hella feast or famine which is a playstyle I don't hate but can be frustrating as all hell for you and your teammates.