(This will probably be moved to a different forum.)
There is a ton of information online. Parks Canada is especially helpful.
A guide book many people like is
Don't Waste Your Time in the Canadian Rockies. Others are good too.
Field info center has a ton of material as well.
Top of my don't-miss list is the Burgess Shale Foundation guided hike into Walcott Quarry, about which Stephen Jay Gould wrote
Wonderlife Life.
https://www.burgess-shale.bc.ca/ It is in Yoho. Meeting place in Field or at trailhead, outside Whiskey Jack Hostel.
While there, I would also recommend The Iceline, which can be a partway out-and-back or a RT. Takakkaw Falls is right there, and 1/4 mile from parking area is a walk-in tent site.
Across the road and down a piece is Lake O'Hara, with 3-4 splendid hikes. 7 mile walk in if you do not have bus reservations. Can check at Field info center for latest bus cancellations, and to reserve if possible (reservations may be made through Parks Canada, but they are gone for the year). Lake O'Hara is wonderful enough to plan ahead and secure a campsite, another year.
Drive to Jasper along the Icefields Parkway. It has all the glaciers one would want to see. There are some not too demanding hikes along the route. One is 5 Lakes.
Jasper environs is another cluster of opportunities, including Mt. Robson Provincial Park and a nice backpack along Berg Lake. That is not the focal area of your this year's trip, however.
Lake Louise has 3-4 major attraction hikes that can be done without a minimum of 4 people.
I prefer Castle Mntn campground, on the Bow Valley Parkway, which has some wildlife:
https://www.banfflakelouise.com/accommo ... campground
From there you can reach most destinations of interest with a bit of driving.
The Lake Louise campground is in Lake Louise townsite, 3 miles from the lake and hiking. Reviews are mixed. There is also an HI in Lake Louise.
It's a great place and worth multiple trips.
(I believe poster "teapot" is among the local experts.)