Can you spell out what you are getting for your €30k OSS spend.
It looks like you have a high A/low B rated house based on those consumption figures and usage pattern. This isn't that bad assuming of course that your house is comfortable etc. Some comments;
All else being equal, moving to a hp could save you somewhere between €200 & €500 per year excluding any solar/battery influence. This opinion is based on a heap of assumptions so cannot be really relied upon.
Your electricity consumption seems quite high, any reason for this? There could be easy wins here!
Likely you will save some money ... but enough to justify the investment???