I use washable nappies 95% of the time.
We started washables at about 12 weeks, so went straight in to birth-to-potty (BTP) nappies. If I was to have another baby, I would use washables from birth, but would buy newborn ones preloved, then sell them on when outgrown. The BTP nappies really do swamp a newborn and are likely to leak because the fit isn't so good.
We use washables when out too. It's no more hassle to pack a bag with washables than disposables, and I just have a wetbag with me to carry the dirties home. Unless you're going to change in to a disposable before leaving the house each time, there will always be the dirty you take off at first change to carry round, even if you then switch to disposables. Also, I find My washing routine breaks down if I start using a mix of washable and disposable; I don't have a full load by the time I am worrying about how long the oldest ones have been sitting waiting for a wash. It all works more smoothly for us if we are full time in cloth.
I said at the start that we're 95% in washables. That's because we do have disposables in the house, and use them for some nights, for flights when going on holiday (though we use the cloth ones once actually on holiday), and for speed if i need to change baby in a hurry and haven't got any nappies prepped and ready.
Our system works best if I prep the nappies once they're dry. I use close pop ins, so have two inserts to snap in, then a fleece liner and a disposable liner. It takes me about 10 mins to set up enough nappies for 2 or 3 days.
Good luck! I enjoy using cloth nappies (especially seeing them all blowing about on the washing line in summer!). If you buy preloved, then there's very little to lose by trying them :)