I'm a bit late but here:
Just clear the enemy wards in the bot lane river with a pink or red trinket then camp the bot bush for 10 seconds.
If they stay near tower for that entire time, you just pressured the lane. Don't waste anymore time. Go back to farming.
If they come ward, ping the warder and throw out cc to start a fight
If they start pushing again, ping for the gank and then gank them.
If your laners don't respond to your pings, fuck that lane. Never gank it again.
No worries, better late than never! Thanks for the specific instructions, it helps! I'll keep these in mind.
In other news, went back to Nami and boy, that felt good. We won bot despite my friend who is low silver (and never ADCs, was trying Graves) vs 2 Plat Vayne/Nunu. Forgot how strong she was. Also had a really nice match as Thresh but their Akali top got immense and I couldn't peel her off Caitlyn and she would wait until Amumu had used his ult to go in.
Also, in hindsight I shouldn't play more Bard. I lost 1 match yesterday (the only one so far) so I think I'll keep it like that. Probably wasn't a good idea to pick it with Ashe (we had some miscommunication during picking lol) but yeah, I didn't play that well and we lost to a B4 Thresh and a low Plat Lucian ._. but I feel that was more because of me than because of them.