I'm very new to D&D (5e) and my first character is a Monk w/ Hermit background, currently level 4 (Way of the Open Hand)

For RP reasons he's only going be unarmed, so obviously I want to wait a bit before multiclassing. I'm think either after level 5 or 8 depending how the campaign progresses.

My goal is to make a battlefield controller that zips around hamstringing casters and assisting our Rogue and Barbarian on the front lines. I already know my first error was taking 2+ Dex instead of the Mobility feat, I plan on taking it at Lvl 8 though.

Anyway, I realized I could save some Ki with free disengages, and add double dashing to my repertoire, by taking 2 lvls of Rogue. I was then looking at the archetypes at lvl 3, and most wouldn't help much since I don't use weapons, but Scout caught my eye with the Skirmish feature (If an enemy ends their turn within 5ft of you, you can use your reaction to move half your movement speed). Plus I think it would be cool for RP reasons for my Monk to be an expert at Nature and Survival.

Do you guys think its worth it? Should I just go straight Monk since I don't get Sneak Attack, and plan on getting Mobility anyway? Would it be better to just go with Swashbuckler and skip the Mobility feat?