New orchids help

[Neferet]

Hey all , I just received my new plants and I would like some info if anyone has the time to spare.
I got one Masdevallia strobeli and one Masdevallia veitchiana. The later has some weird white spots on the leaves I haven't seen before on a plant . I thought it might've been dehyration but I would really love a second opinion on that. Also would it be better to grow them in terrarium with 80-90% humidity ? Do they need a lot of light ?
I also got a Dendrobium helix and a Cattleya Slc. Hawaiian Splash which are still young plants any info on those would be appretiated aswell.
Last but not least I got a Anoectochilus sp.'red leaves' which came with a hole on a couple of leaves and I found some sort of worm walking on the pot. I took it out and I've used a worm/snail killing insectcide and it's seating in isolation.

Thanks for your time ,
Fotini

[King_of_orchid_growing:)]

Masd strobelii:

IOSPE PHOTOS

In case you weren't sure, the temperatures at the elevations they're found at are intermediate (around 55 F - 90 F).

Masd vietchiana:

IOSPE PHOTOS

This one is cool to intermediate (36 F - 85 F).

The "white spots" are some sort of mold or something that isn't really harmful.

Den helix grows intermediate to warm and are huge plants when they reach maturity. Bright indirect light. They bloom at around 2 - 3 ft tall. It's a possibility that certain individuals may bloom at about 1 ft - 2 ft, but don't count on it being a common occurrence.

[Neferet]

Thank you for the info! Your answer about the "white spots" was a relief!