Lump sum investment or something else all together

Thoughts on a 100-125k lump sum investment into VAS VGS via vanguard in a 80:20 or 70:30 weighting favouring VGS?

Can’t get into property yet as I’m a medical student in my penultimate year of uni but also don’t want inflation to devalue my savings until I’m at that stage.

If the above doesn’t seem like a great idea as I need to be liquid until I get into property, can can I make best use of up to 200-300k in the 3-5 year period I have?