I like to shoot close-ups mainly but I would like to be able to do full body or even small groups. So for the close ups its best to use up to an 85mm and about f/1.8 or f/2.8 and for the groups (large groups mostly outside) use 85mm and up with 5.6 or higher? I have some group shots that I took of my...

I am new to photography and I would like to know what would be a good, sharp lens for me to use? I asked about a couple of weeks ago and some of you use Canon 50mm f/1.8. What type of shots is this lens use for? I shoot mainly close-ups, inside & outside. I also shoot indoor & outdoor sports...