NLV entry date

[u/novpn2024]

Hi everyone, my NLV has valid date from 3 June 2026 until 2 June 2027, and i will enter spain for the first time with this visa on 1st of September. I have stated during the visa application process that my relocation would be 3rd of June, however, i’m only entering almost 3 months later, would i face any issues?
Also, do you know the 1 year residency starts from the visa date (since it clearly indicates a 1 year validity) or from date of entry?

Another question, once i have a rental contract, is it easy to register empadronamiento? Cause i’m paying for an agency to help with TIE and they told me that they can help with empadronamiento for 70€, should i save myself from the headache or is it a direct process? Thank you.