(Tu) Regular maintenance Bravo 1.9 JTD?

Hello everyone!
Last week, I got my hands on Bravo 1.9 JTD 74kw 2001 with just 234xxx km on the clock. Problem is, I'm furious that I know nothing about Fiats and diesel in general (I used to drive E36 316i, that car was easy as hell to work on). I'm curious, what should I look for on Bravo? What are the things I should change as soon as possible or are prone to break easily? Obviously, the smartest move would be to drive it to a mechanic for inspection but I want to hear from you guys who used to drive or still drive this car.
I was also thinking of chip tuning it, it only costs around 100e where I'm from. What things should I change/check before I decide to do that?
So far, I have only changed the ribbed belt and I'm planing to change every filter and pour in some new oil.

Hi

Yes filters and fluids

Cambelt too

Keep a close eye on the Coolant system

Second the above.
Find out when cam belt kit including water pump last changed.
If it's due a change again do it.

Glow plugs and the relay were a regular thing on mine. But I should add that mine was a 99 model 105JTD.