Trousers change the context
Try a plain sweatshirt with straight tailored trousers. The difference between a soft top and smooth trousers already moves the combination away from a tracksuit. A shirt underneath is optional. If you add one, check that its collar and hem actually stay where you want them.
A firm sweatshirt band may rest on a high waistband. Do not automatically push it inside if that creates a bulky ring. Let it hang freely first and compare a shorter version. A suitable hem is often more useful than an elaborate folding technique.
A skirt needs room to move
With a fluid skirt, sweatshirt fabric should not catch against its surface at every step. Walk around indoors for a few minutes and sit down. If the skirt rides up beneath the band, a looser hem may help; extra accessories will not change that behaviour.
A straight skirt with a wide sweatshirt creates different shapes from a full skirt with a cropped one. Decide from the complete outfit. There is no requirement to pair every loose top with a narrow lower half, provided you like the movement and the proportions you see.
Shoes and visible details
Loafers, simple lace-up shoes or flat ankle boots can change the context without requiring heels. Recheck trouser hem length whenever you change footwear. A small handbag gives a different effect from a gym bag, but it still needs to carry what the day requires.
With a large printed graphic, take another look at the other details. Patterned trousers can work beside it, but that is a different decision from choosing a plain pair. Let one element lead initially, adding others only when you would genuinely wear the combination. The sweatshirt does not need to conceal its identity as a comfortable top.
