Am I scared for no reason?

Hello everyone. I thought I'd make a quick post about how I feel about RuneScape, in case anybody can encourage me a little.

I've been playing RuneScape for a few months (I started, played 2-3 months, quit a few months, then got back in recently) and I've been getting my stats up and my quests done.

I still have ways to go on my goals, but I just have a paranoid fear of bosses. I love bosses and it's all I want to do when I get bigger stats, and I think I have the stats to do a few bosses, but I feel like I won't be able to kill them.

It's a bit weird, but I think it has to do with their HP. I've killed quest bosses with 150-200 HP but even they were a bit scary to me.

A good example for this would be Scurrius. Everyone says it's an easy boss, wiki says 60+ stats recommended. I have more than that, and the 500 HP + healing + the rats that deal dmg through prayer is insane to me.

For reference, my combat stats are:

71 attack 71 defence 71 strength 60 ranged 90 magic 70 prayer

As for combat sets, for melee I have abyssal whip, dragon armor and neitiznot helm, combat bracelet and amulet of glory. For magic I have the mystic set (probably needs an upgrade lol) and ranged I just recently got up to 60 so I just have black dhide set and no bow cause I was chinning.

So, am I paranoid for no reason?