Inferno is completely free in leagues, stop worrying.

I dont think you quite realize just how easy inferno actually is with these relics.

To put things into perspective, alot of waves in the maingame can already be just bruteforced by just dpsing down whatever is hitting you. Not a great strat, because inferno is an endurance run, but we have such high dmg and things like prayer regen potions for extra supplies that its completely viable on hard to solve waves.

Now, this is leagues we're talking about. I will ignore bankers note because its super overkill, but its there.

Everyone gets 20% more healing, 100% accuracy, 15% damage reduction and 25% more prayer restored. Every combat style gets a lifesteal relic aswell.

It is blatantly obvious that the jmods WANT you to finally dip you toes into inferno. And they are shoving a golden spoon where the sun dont shine, giving you everything that helps you for endurance based content. Use it, I promise you it will be braindead easy.

Solving the waves is the hard part of inferno, well they are now solved for you. So go play the zuk sim a couple times and get at it.

EDIT: I'm getting a ton of comments about Zuk/Jads not being free, and alot of people seem to not know/missed what i said about doing colosim. https://inferno.colosim.com/ This is an amazing tool for inferno, as you can practice jads and zuk as much as you want, with a "pretty close" to the actual game feeling simulator. Make sure to turn the ping to 0 in the settings for a smoother feeling. Choose wave 68 and 69 on the sidebar for jads and zuk. And remember, even if you struggle with jads or zuk, you are so much stronger in leagues than this sim.

EDIT 2: If the simulator is laggy for you, try a different browser (Chrome is laggy for me, firefox is not e.g)