Sometimes the cursor acts like a drunk bee. That means the driver isn’t installed properly. Go back to Wacom’s site and reinstall. It’s fine. We’ve all been there.
Your pen might not work when you hover above the tablet. Check the battery if it’s a wireless pen. Most Wacom pens don’t need batteries—they use magical electromagnetic woo-woo. But some older models do. Pop in an AAAA battery. Yes, AAAA. Don’t ask why they exist. Just buy a pack.
If Bluetooth keeps disconnecting, just use the cable. It’s not shameful. Wired is more reliable anyway. Plus, you look like a serious digital artist with a cord trailing across your desk.