Japanese Keyboard Kana mode: How to add ten-ten and maru to Hiragana characters, and Katakana Characters?

I am using the external Japanese keyboard with my MacPro, which has an US internal keyboard.

I selected the Kana "Typing method" in the System Preferences.../Keyboard/Input Sources/Kotoeri/

so I am using the native Kana mode, for example if I type the key 'Q' the Hiragana character 'た' will be entered.

1) Now I would like to enter the additional ten-ten { "" } or maru { 。} symbols to an Hiragana charcter:

- For example for は (ha), I would like to chnge to ば (ba) or ぱ (pa).

So far I have not been able to find how to add ten-ten { "" } or maru { 。} symbols,

so I am using the "Japanese Kana Palette" to enter such symbols, but this is not very practical...

2) I would like also to enter the Katakana character while my external keyboard is set in Kana "Typing method"

- For example if I type the key 'Q' the Katakana character should be 'タ' instead of the Hiragana character 'た'.

There must be an easy way to switch between Hiragana and Katakana but I haven't been able to find how...

Note: When selecting the Romaji "Typing method", I just needed to press the [shift] key,

but this is not working under the Kana "Typing method"

Thank you for your help.