Ok here is the problem with a 61 key keyboard -
1 - the keys are most likely not weighted, meaning it feels like you are just pressing down some springy plastic.
2 - 61 key keyboard has an ok amount of keys but it really isn't smart because it limits what pieces you can play.
1- You should look for a digital piano - asuming you maybe dont have a big budget, look for the Casio PX120 its something around 400 - 600$
It has 88 Weighted keys, and very many have this keyboard, its good for beginners and for people on a low budget.
2 - If you have a slightly bigger budget, I would look at theese
Kawai CA 51
Yamaha CLP 340
Roland HP203
or
Yamaha P150/P140
Kawai CN31 or CN32
Roland RD-700GX
All theese are great Digital pianos so check it out!
but i mean thats just my opinion. however the best thing would always be to go for the real thing ... but thats not necessary
But if you cand afford any of that atleast have a look at Casio CDP 100.
ANyway i find it not okay to learn piano on a61 key piano,, better buy a 88 key now than later.