It's hard to imagine being active in Bitcoin as long as you have, without ever selling/sending any coins. Good for you!
For consolidating, you may want to read
Consolidate your small inputs @0.11 sat/vbyte. Especially if you have many small inputs, you can save a lot on transaction fees by not using the wallet's default setting.
Depending on how much Bitcoin you own, you may want to reconsider moving everything into a new hot wallet. There's no need to risk it all, so you may want to look into cold storage.
For Fork coins: I used to get BCH, BSV, eCash, BTG and BCD. Now, BCH is worth about $440 per Bitcoin owned at Fork time, and the other 4
combined are worth about $10-20 per Bitcoin at the time. They also get harder and harder to sell, so most likely those aren't worth your effort.
TL;DR: move your Bitcoin to safety, import the old empty private keys into Electron Cash (don't trust this software on your system so use a spare system and wipe it afterwards!), and consolidate them onto a new address (or exchange them).