Hi, I haven't welcomed you here
welcome!
you got good tips so far
to add to what was said - coco fiber is the best out there, as long as it fine, Exo earth is the finest, plantation soil is the second best, but both are fine. Neither would contribute to impaction.
and in general I must say, good for you, you are thinking, asking questions ahead of time, well before getting a frog! You have my respect for sure... Saying someone who not once did an impulse buy lol
anyhow. Re plastic tape or any tape inside the enclosure... There is nothing worse then taking it out from reptile......it is nightmare to take it out the frog, in many many cases impossible due to their skin structure and the on,y way is to euthanize a frog. You do not want any types of tape anywhere near your enclosure. Only for outside if needed. Never inside.
You should be able to tong feed them, this way you know exactly what goes in and how
try different things, but tong trained frog is so much easier to deal with in veterinary situations if any arise, less stressful for a frog to feed meds if ever need to, etc.
as for source - shows or reliable online stores are the best bet, but even then plan on setting up a quarantine for your new frog, do a fecal testing, observe pooping and eating before you transfer the guy into his permanent home.