It will take a few months to develop a sense of pricing. For me, it was helpful to have a house appraised by the inspector. I then recreated his calculation in Excel and was thus able to assess other properties quite well. The necessary parameters (BRW, construction price index, value-preserving measures) can be found online, updated annually.
In addition, you should know the strengths and weaknesses of a construction year to estimate follow-up costs. A realtor wants a quick success. An informed buyer, who maybe offers less but knows what he is doing, can be more attractive than one who agrees immediately and then backs out again after two weeks or at the notary. So you need to project knowledge and determination and be able to defend your price. The realtor must hit a stone wall with the emotional approach towards you.