at the beginning using telegram was quite easy and helpful for getting news, being updating, trading and following the projects i liked. Lately i have found myself on channels that are only scam, absolutely useless and so i do not feel safe to trade on telegram since i do not have any security on the trading.
i have been using Binance, kraken and Kucoin moinstly. tried poloniex and hyobi as well, but the first three i find myself more comfortable.
to do the cash out i use Coinbase Pro with has less, almost no fees, of course, any platform has pro and contra and you have to try and find the one you feel better