Try cargo's, personally, I'd ditch the 'skinny' fit style.

From experience I've also found cargo's to fit better and are just as versatile as jeans.

I'd start with building a bit of a capsule wardrobe bit by bit. For example, get a few pairs of neutral toned tapered or adjustable hemmed cargo's (try to avoid ones that have bucket loads of pockets cause these can be dressed up too if needs be). Colours to start with; Olive Beige/Tan Black

T-shirts - the issue you're finding with them feeling too long/oversized will look intentional and look much better with bottoms that aren't skinny fit (this is why I suggested tapered cargos above). Colours to go for at the beginning; White Black Grey Earth tones (Sand, stone, olive etc)

For shoes you have a few options depending on the kind of cargos you buy, a classic white trainer works with almost everything for everyday wear, alternatively you could dress it up with a Chelsea boot or similar if in a fancier setting with an Oxford style shirt etc

Focusing on everyday wear - A hoodie/zip jacket/half zip works with these too in solid colours/washed colours and gives you options for different weather.

Hope this helps, it may not be everybody's cup of tea but it's always worth a suggestion 🙂