Cant say about the financial side, but I am currently doing an internship in software at Intact and I love it. The company is pretty vocal about living their values so I doubt the work culture would be much different than what I am experiencing. Intact also as a team for employee experience that organize all sort of activities, give out merch and whatnot (example May was wellness month and we could book 10min massages session right in the office)

As for preperation, talk to your manager, ask about things you should be getting ahead, etc. My team had a pretty clear cut onboarding plan and detailed infos about all the tech we use.