Hi i start to wean mine about 4 weeks too,

I start with a mix of baby rice and cimicat milk, i get them to take it from my finger 1st, then when they get the idea its usually only a couple of days and there lapping of a saucer.

When there all lapping will, i start soaking some biscuits and mix it into the baby rice and milk, sounds disgusting but they eat it.

Once there about 6 weeks i gradually reduce the amount of milk and increase the biscuits.

good luck