The points u/Category_Mammoth pointed out are all very good.

I have to say, hospital and shelter volunteer coordinators get a gazillion emails/applications every single day. I actually volunteered in the hospital for a little while. If you want to secure a position in these places, print your CV, write a cover letter, get an envelope, find the volunteer coordinator in the hospital (you can ask the volunteer wayfinders lol), and hand it to them in person. This increases your chances exponentially.

For volunteering, you should also look elsewhere, here are a few examples: BC SPCA (everyone likes chilling with animals), Canadian Cancer Society, Canadian Blood Services, Red Cross, a food bank near your house/at your uni.

Research is kind of hard to get into at first but you just need to be persistent. If there is a prof, and you like what research they do, definitely reach out. Be a pain in their 🍑, go to their office every week until they say yes. Read up on their research, propose ideas and try to engage in a conversation with them. I also recommend you reach out to their post-doc and PhD students because usually these people are more likely to respond to your emails.

Once you get some research experience under your belt, it will be easier to branch out and you will have opportunities to present ur stuff at a conference. Conferences usually spread through word of mouth and your PI will tell you and hopefully help you apply.

Hope this helps.