Moving and working as self-employed: right order of things

I'm moving to Malta at the end of this summer and would like to continue my freelance job which i'm now doing in Belgium.

I've been reading through the forums a bit and so for i've worked out the following bits:

- Getting the EU national ID card is going to take a loooong time In order to do that, besides getting the appointment and all that, i have to fill out a form, applying as self-employed.

- Registering as a self-employed worker doesn't seem that hard (found forms for that too, with the employment office and then VAT), but you need a social security number. So that would be the first thing to do? I read a post about it on "How to get by in Malta", where it seemed quite straightforward, although it looked like the office was in Sliema, not Valetta, and it didn't say if there are many of those offices and if you can choose one at random. Can I get a Social Security Number just with my Belgian passport?

- Other than that, have I overlooked something?

Recap:
1) social security number
2) register as self-employed
3) apply for ID
.
.
.
.
.
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4) many months later: get a discount fare on the bus

Any idea how much social security contributions are for freelancers? (A whopping 20% in Belgium...)
And I suppose i'll need to find accountant to do my taxes?

So many answers. Many thanks for any input you might give me - Nil

An