How to improve espresso shots from Wonderchef Regalia 15 bar

https://preview.redd.it/2c0siakn0xlh1.png?width=726&format=png&auto=webp&s=2e2c02560c9254ef8b5abc0661d6f489cc061856

So I entered home espresso game with this coffee machine a few years ago. It never produced dense espresso shots (more like a long espresso) but I was always able to get decent crema. As can be seen in the product's official picture, the density is quite low. Has anyone customized this to get a proper espresso shot? Or I should sell this off and look for a better machine?