My husband is asking me to go on an 8km trail run with him in Rizal next month. Has anyone tried trail running? What skills/training do I need to know that I can complete it?

I haven't tried running on trails, I have no plans. But I had watched my husband to bike on Filinvest trails and it was nerve-wracking. It's tough, everything is slippery. I think, you must start and run slow to avoid accidents.