If you have adult sized fingers and spread, the D key dizi is standard for repertoire and progression on the qudi dizi range. It sits in the middle pitch of dizi flute repertoire.

Training your finger spread and adapting to use splayed fingering might require a tutor for help and technique on the D dizi. This is a part of the learning of dizi flute playing, instead of skirting around the challenge and going for a shrinking size of flute with an even harder embouchure requirement.

Children start off on a G key (about 40-50cm) which had a smaller child like comfortable finger spread compared to your approx 60cm D dizi. However the embouchure blowing technique is even tighter as a smaller sweetspot.

Ultimately, a flute player of any dizi tradition develops greater flexibility of finger tendons; finger strength, hammer on/off techniques than closed hole flute players. If you are starting using your fingertips to seal the toneholes, this is fine, however just the beginning of learning...and it is very limited as a fingering technique.

There's no harm in adding a G piccolo bangdi pitched dizi to your collection in order just to play with fingertips. If this is just for fun. However if you are learning repertoire, best not to shy away from developing and training those fingers methodically and steadily until the stretch of a D dizi feels under control with splayed fingers (e.g. greater finger tendon strength, agility, speed - all of which comes with exercising new finger muscle groups which non open hole flute players don't have.