Nice to meet you! As for the question, I keep 10,000 TRCs, which one should I use? I am using Windows!
Terracoin-cli.exe
Terracoin-qt.exe
Terracoind.exe
For Windows you just need to download Terracoin-qt.exe. It does have difficulty finding nodes so you will need to manually add nodes.
Use the console and copy and paste each line:
addnode 62.138.3.214:13333 add
addnode 23.152.0.149:13333 add
addnode 108.61.10.90:13333 add
addnode 82.200.205.30:13333 add
addnode 93.113.101.229:13333 add
This will be fixed in the next update, and I already adjusted the code for Linux.
If you are not familiar with the console, then join slack and I can send you screen shots. Bitcointalk makes it really difficult.
Is there Slack chan? Telegram? can't find any thing

Public Slack Invite
https://join.slack.com/t/terracoin/shared_invite/MjEzNDYxNDk2NDU0LTE0OTk5NzM4NzEtM2Q2MmQ0OWYzYQPublic Telegram Invite
https://t.me/joinchat/F3LRkQpQ2VQkAphfchl9Mw