Useful information from Rainingblood, though if my original post is lesson one his is more lessons 2-5.
As a beginner in Cyrodiil, you are generally better off in support roles: Shooting siege weapons, healing, rezzing, repairing. Once you have a few sessions under your belt you can be more adventurous - but you will die a lot as a normal consequence of trying new things against more experienced players. Don't worry about it. Have fun.
When you can spawn at EITHER the keep or the Forward Camp in it, please spawn at the keep instead.
They are "free".
FC respawn are not. It can only hold 20 respawn before you need to replace it.
August Palatine Davadin Bloodstrake - Nord Dragon Knight - PC NA - Gray Host
Greymoor 6.0.7 PvP : Medium 2H/SnB The Destroyer
Dragonhold 5.2.11 PvE : Medium DW/2H The Blood Furnace
March 2021 (too lazy to add CP) PvP: Medium DW/Bow The Stabber
Don't bother to set a guest campaign. Look into your trading guild for players of your faction in Cyrodiil and use "Travel to player". As this is apparently working as intended, everyone should be aware of the possibility to circumvent faction lock and other stuff.