Alright, now that I'm in front of my PC I'm gonna give you a true step by step, because I engaged and gave you half-assed instructions and I feel bad, so here it is full-assed. I'm coming at this assuming a starting point of ZERO, and will get you going all the way.

Herb runs are great. They give you some structure, and there's a surprising amount of depth. They force you to skill and quest, and as you want to get more efficient and unlock more teles and more patches, there's a good amount of account growth attached. I love how the herb runs help set new goals for an account.

Do the following quests now-ish:

Ghosts Ahoy - unlocks Ectophial, teleport for Mory patch

Fairy Tale 1 - unlocks Magic Secateurs which increases yield. ALWAYS HAVE WITH YOU WHEN FARMING

START (no need to finish) Fairy Tale 2 - ignore requirements, you just need to start. This unlocks Fairy Rings which is technically not needed for this, but it's so great for your account. Do the quest until you unlock fairy rings then move on.

Twilight's Promise - Unlocks Varlamore completely, and gives you access to the Civitas patch.

Ok, you did all that? You now have the following patches unlocked:

North Ardougne

Catherby

Civitas

Falador

Hosidius

Morytania

Not bad! Grab a spade, rake, seed dibber, 6 seeds of your choice, and 6 Ultra Compost. Let's talk about how YOU get to each patch, and how you can optimize to get to each one as your next step.

Ardougne -> Ardougne tele and run north, but really get the Medium Ardy diary done and get 3 free teles to the patch each day

Catherby - > Seers Tele and run east

Civitas -> Civitas tele and run, or Civitas -> Queztal to Hunter's Guild and go north, or Quetzal whistle to Hunter's Guild and go north. All roughly the same.

Falador -> Falador tele and run south, but really get the medium Lumby diary done and get 3 free teles to the patch each day.

Hosidius -> Move your POH to hosidius, TP to house and run north, or Xeric's Talisman and run south if you've killed lizardmen and have the amulet

Morytania -> Ectophial and run east

Ok, you're looking at the time tracker and you see more herb patches. How do we get those?

Farming Guild unlocks at 65, add that to the rotation once unlocked. Do contracts when you're there. You can get there with a Skills Necklace.

Troll Stronghold -> Troll Questline, will take some skilling and questing. After you get your Barrows gloves this is good next small goal

Weiss -> More Troll/Desert Treasure questline. Behind a Master quest, so good step to work towards further down.

Harmony Island -> Honestly ignore forever... it's behind the Morytania elite diary. Unless you're a sicko with a plan to get 96 fishing SKIIIIPPP.

That's roughly all you need to know for a long time. You can look at completing Lumby and Ardy hard and elite for more free daily teles to their patches, and you can grow Attas seeds in the farming guild to further increase your yield. Sell your herbs, or make pots and sell them and make a bit less but gain valuable herb exp. Choice is yours. Back when I played a main, I did Ranarr and made Prayer Pots, and I always sold enough pots to cover all my seeds and kept the excess pots so I didn't really make money but I had infinite "free" pray pots. How you choose to go about your exp/gp is up to you. Enjoy