It's natural to be a little aprehensive as it's unknown territory as such. The basic's are pretty easy, fine tuning is a bit more difficult as it does take time as you have to deal with everything as a new experience, but as you build your experience the easier sorting out new situation because easier...
As to wearing and cloths, at first it takes some thought, trial and error in placing, but again you soon sort this out... There are verious cases/holders available, and with a little imagination you be surprised what items can be used...
Pumps manufacturers supply with or for purchase separatly..
Different cases,
Some that clip to clothing
other that can be used with with either belts or can be used with starps,
They have thigh holsters
Hosters to clip to bra's..
The do supply straps for thighs and waists..
Other items you can use
baby socks can be used sawen into clothing to hold the pump..
Mobile phone and compact camera case's can be utilised to hold a pump
Some people modify, pockets etc so that the pump tubing can thread throw a hole in the pocket out of sight etc..
As for activites, you can detatch the pump you may have to bolus the missing basal insulin before you detach it, or when you reattach it... If longer than 2 hours, then you need to inject or reattach the pump to bolus the missing basal insulin...
The pump has a couple of features that are very proactive in management, and tackling changing situations... You can pre=program several basal profiles, so you can at a press of a couple of buttons change from one profile to another, From an hedic day to a chill out day, as plans change.. To help even futher you've got the TBR (tempory basal rate) where you can quickly program an increase or decrease in basal rate over a selected period of time, to counteract things such as stress, infection or a little extra activity etc.. So Idea for keeping up with kids and dealing with the demands of studying for a degree...
You soon learn, where the best place is for the pump for doing what, how to use it to your best advantage etc..
I wouldn't return to MDI willingly at all...