Exactly, for er words, all endings sound the same if you change the 'nous' form (with 'ons' ending), for 'on' which is also third person as 'il' or 'elle'. Using 'one' in English sounds riculous and pompous (as in 'one is now a grand-mother) but in French it is perfectly acceptable and understood. So orally, same sound ending for all subjects, apart from the 'vous' with 'ez' (sounded).
je parle
tu parles
il/elle/on parle
ils/elles parlent all sound exactly the same.
Ici on parle français. Demain on joue au foot. L'année prochaine on va en Ecosse (no need for future tense, it is implied.
For the future, which is difficult as the 'root' changes for so many verbs- use 'aller + infinitive. Shame 'aller' is the most irregular tense in French- but just learn it by heart and use it again and again. And again, use 'on' instead of 'nous'
demain je vais à Londres (no need for future- it is implied). Or 'demain je vais voir mon ami Jean'
tu vas au cinéma ce soir? (future implied). Or 'tu vas jouer au foot ce soir?'
il va, elle va, on va au restaurant demain soir
vous allez regarder le match ce week-end?
Ils/elles vont visiter l'Ecosse cet été.
A pain of a verb to learn, but you can use it to express the future again and again (just like 'going to')..
As for the subjunctive, no need at all in most cases. Learn how to use another structure instead! 'il faut que je fasses attention' = 'je dois faire attention'. Done.
Most teachers make things much much too complicated and for no reason. Effective communication without the pain. Great.