Solo travel for the first time since years – Salina Turda (Romania) advice needed

Hello there!
I was thinking about a solo travel to Salina Turda in Romania.
It’d be at the end of July.
I’d love to stay for more than a weekend and as it’s been a while since I travel alone, I’m looking for advice about transport since I don’t have a car and general safe stay.
I read there isn’t a train station near the Salina – no surprise – but there is a bus from Cluj. It also seems there is a walk of 3.4 km or so to get there.
Any experience about a stay in Cluj? Is there something you’d recommend – or not – to a lone lady?

recap:

Looking for advice about a trip to Romania – especially Salina Turda
**Who**: Me alone
**What**: Most of all, I wish to see Salina Turda!
**When**: End of July – Early August. 3 to 6 days cap
**Where**: Romania, Cluj, Salina Turda
**Why**: Because it’s been ages since my last trip and I miss going around and seeing new things but I’m also a little bit uncomfortable since I don’t travel alone since 2013, I guess…

Thanks to everyone! I’d love to hear about your experiences!

Solo travel for the first time since years – Salina Turda (Romania) advice needed