Advice on getting Volunteer roles

Hey everyone ,

Looking on advice for getting volunteer roles in Accounting and Finance. Mainly looking for roles that would be assistant treasurer or Financial Assistant. Currently i have found some roles Online and have applied and most often than not been denied. There also doesn't seem to be many. Looking for the best way to get these volunteer roles , should i just be knocking on doors and looking for places? I appreciate any advice that might lead me in the right direction , thank-you.