Welcome to the game!
There's good info in the previous posts. My two little suggestions is- take your time to explore your character and the life choices you will be making, in quests, before you commit to any guild. Who your character is determines what kind of guild will help you grow into a deepening personality ig. You mentioned a healer, and a researcher, so look for players who's ig characters value life, who have trusted friends, and who are also committed to healing.
Second suggestion is a reiteration. Do as many quests as you can, you'll no doubt find out huge amounts of lore and world realities from them. And keep your ig eyes open to other sources of info beyond the words of npcs and pcs.... there are signposts, things to read in surprising places, and dynamic states of the environment that will be of eventual use as your character grows.
Look for me, Roled, a Dermorian elf, if you want, and RR as I call my character, will be happy to help you out if he can.
RR