What you can do yourself and when to get help
You can do these yourself: set up your Google Business Profile, ask for reviews, reply to them and keep your business details consistent everywhere. This takes regular attention rather than technical knowledge. Google itself says small-business owners can do much of this work.
Consider getting help with: your website’s page structure, titles and descriptions, speed, structured data and Search Console setup. Someone who does this every day may need a few days; learning as you go can take several weeks. The initial setup is a one-off job.
A monthly contract can make sense: if you serve a national market, run a large online shop or compete with dozens of businesses with substantial budgets. That is less common for local services in a town like Leszno. If you are starting from scratch, a website I build includes this foundation.